Get the Tenant's Runtime limits

Replaces the Tenant's Runtime limits: a limit left out takes its default. A limit above its ceiling, which a dependency sets, is `400` naming the ceiling, and nothing is written. Each is read where it is checked, so a new value holds for the next request, write, call or segment. Defaults and ceilings: `recordEntryBytes` 983040 bytes, at most 983040 (S2 takes records of at most 1048576 bytes, and an event's envelope needs 65536 beside its payload); `modelCallBytes` 33554432 bytes, at most 536870888 (the Model Gate reads a call's body as one string, of at most 536870888 characters); `modelFileBytes` 8388608 bytes, at most 402653166 (a file goes to the provider as one base64 string, of at most 536870888 characters); `toolAnswerBytes` 8388608 bytes, at most 33554432 (a harness reports the answer to core in one Harness API frame (67108864 bytes), as JSON, whose escapes may double it); `harnessStateBytes` 262144 bytes, at most 33554432 (the state crosses in one Harness API frame (67108864 bytes) with the rest of its output or turn.start); `chunkBytes` 16777216 bytes, at most 50266112 (a chunk crosses in base64 in one Harness API frame (67108864 bytes), with room for the frame's own JSON); `folderEntries` 10000 entries, at most 4628197 (a folder's manifest is read as one string, of at most 536870888 characters, and each entry takes at least 116); `requestBodyBytes` 1048576 bytes, at most 536870888 (a body is read as one string, of at most 536870888 characters); `messageParts` 32 entries, at most 19884106 (parts arrive in one request body, read as one string of at most 536870888 characters, and each takes at least 27); `pageItems` 200 entries, at most 178956962 (a page's items go in one response body, written as one string of at most 536870888 characters, and each takes at least 3); `exportPageItems` 1000 entries, at most 178956962 (a page's calls go in one response body, written as one string of at most 536870888 characters, and each takes at least 3); `environmentEventItems` 1000 entries, at most 178956962 (the events go in one response body, written as one string of at most 536870888 characters, and each takes at least 3); `inlineFileBytes` 20971520 bytes, at most 402653166 (a file sent inline arrives in base64 in a body read as one string, of at most 536870888 characters); `a2aWaitMs` 300000 milliseconds, at most 2147483647 (the wait is timed with a JavaScript timer, which waits at most 2147483647 ms); `errorExcerptChars` 2000 characters, at most 163840 (the excerpt is kept in one record entry (at most 983040 bytes), where JSON may escape a character to 6); `traceContentBytes` 8192 bytes, at most 983040 (span content is cut from one record entry, which holds at most 983040 bytes); `environmentLabels` 32 entries, at most 59652320 (labels arrive in one request body, read as one string of at most 536870888 characters, and each takes at least 9); `artifactLabels` 32 entries, at most 59652320 (labels arrive in one request body, read as one string of at most 536870888 characters, and each takes at least 9); `labelKeyChars` 63 characters, at most 536870888 (a label key arrives in one request body, read as one string of at most 536870888 characters); `labelValueChars` 256 characters, at most 536870888 (a label value arrives in one request body, read as one string of at most 536870888 characters); `environmentSetupCommands` 16 entries, at most 33554430 (setup commands arrive in one request body, read as one string of at most 536870888 characters, and each takes at least 16); `environmentFiles` 16 entries, at most 16268814 (input file entries arrive in one request body, read as one string of at most 536870888 characters, and each takes at least 33); `environmentFilesPerEntry` 1000 entries, at most 6710886 (the files of an entry arrive in one request body, read as one string of at most 536870888 characters, and each takes at least 80); `environmentSecretSlots` 64 entries, at most 14128181 (secret slots arrive in one request body, read as one string of at most 536870888 characters, and each takes at least 38); `setupCommandChars` 4096 characters, at most 43690 (a command runs as one argument of /bin/sh -c, which Linux takes up to 131072 bytes long (MAX_ARG_STRLEN, with its NUL), and UTF-8 may take 3 bytes for a character); `setupCommandMs` 1800000 milliseconds, at most 2147483647 (the engine times a command with a JavaScript timer, which waits at most 2147483647 ms); `setupOutputChars` 4096 characters, at most 163840 (the output is kept in one record entry (at most 983040 bytes), where JSON may escape a character to 6); `setupReasonChars` 500 characters, at most 163840 (the reason is kept in one record entry (at most 983040 bytes), where JSON may escape a character to 6); `setupCommandExcerptChars` 80 characters, at most 163840 (the reason is kept in one record entry (at most 983040 bytes), where JSON may escape a character to 6); `manifestDescriptionChars` 1024 characters, at most 536870888 (a description arrives in one request body, read as one string of at most 536870888 characters); `secretDescriptionChars` 500 characters, at most 536870888 (a description arrives in one request body, read as one string of at most 536870888 characters); `secretValueChars` 8192 characters, at most 536870888 (a value arrives in one request body, read as one string of at most 536870888 characters); `secretHosts` 32 entries, at most 89478481 (hosts arrive in one request body, read as one string of at most 536870888 characters, and each takes at least 6); `diskVersionEntries` 200000 entries, at most 1917396 (a disk is listed in one Harness API frame (67108864 bytes, each entry at least 35), and a version's manifest is read as one string of at most 536870888 characters); `diskVersionBytes` 10737418240 bytes, at most 9007199254740991 (the files' sizes are added up in a JavaScript number, exact up to 9007199254740991); `diskLeaseMs` 120000 milliseconds, at most 2147483647 (the lease is renewed with a JavaScript timer, which waits at most 2147483647 ms); `diskPodWaitMs` 60000 milliseconds, at most 9007199254740991 (the deadline is reckoned from the clock in a JavaScript number, exact up to 9007199254740991); `modelRequestMs` 600000 milliseconds, at most 2147483647 (the provider's SDK times the request with a JavaScript timer, which waits at most 2147483647 ms); `modelIdleMs` 300000 milliseconds, at most 2147483647 (the stream's silence is timed with a JavaScript timer, which waits at most 2147483647 ms); `modelAttempts` 3 attempts, at most 9007199254740991 (attempts are counted in a JavaScript number, exact up to 9007199254740991); `modelRetryDelayMs` 2000 milliseconds, at most 2147483647 (the delay is waited with a JavaScript timer, which waits at most 2147483647 ms); `modelProviderRetries` 2 retries, at most 9007199254740991 (retries are counted in a JavaScript number, exact up to 9007199254740991); `modelRetryDelayMaxMs` 60000 milliseconds, at most 2147483647 (the delay is waited with a JavaScript timer, which waits at most 2147483647 ms); `toolAttempts` 3 attempts, at most 9007199254740991 (sends are counted in a JavaScript number, exact up to 9007199254740991); `httpToolTimeoutMs` 300000 milliseconds, at most 2147483647 (the call is timed with a JavaScript timer, which waits at most 2147483647 ms); `mcpSnapshotBytes` 4194304 bytes, at most 16777216 (the facts cross in turn.start, one Harness API frame (67108864 bytes), beside the harness's state (at most half of it) and the rest); `mcpPreviewMs` 15000 milliseconds, at most 2147483647 (the preview is timed with a JavaScript timer, which waits at most 2147483647 ms); `mcpMetadataBytes` 65536 bytes, at most 536870888 (the document is read as one string, of at most 536870888 characters); `toolRules` 200 entries, at most 28256362 (rules arrive in one request body, read as one string of at most 536870888 characters, and each takes at least 19); `toolRuleFieldChars` 200 characters, at most 536870888 (a selector arrives in one request body, read as one string of at most 536870888 characters); `toolRuleTextChars` 500 characters, at most 536870888 (a text arrives in one request body, read as one string of at most 536870888 characters); `modelBudgets` 100 entries, at most 28256362 (budgets arrive in one request body, read as one string of at most 536870888 characters, and each takes at least 19); `triggersPerAgent` 20 entries, at most 8521760 (triggers arrive in one request body, read as one string of at most 536870888 characters, and each takes at least 63); `triggerMinIntervalMs` 60000 milliseconds, at most 9007199254740991 (the gap is reckoned from the clock in a JavaScript number, exact up to 9007199254740991); `triggerRunsPerHour` 60 runs, at most 9007199254740991 (runs are counted in a JavaScript number, exact up to 9007199254740991); `triggerJitterPercent` 10 percent, at most 50 (an offset past half the interval could move a run past the next one); `triggerJitterMaxMs` 300000 milliseconds, at most 2147483647 (the offset is waited with a JavaScript timer, which waits at most 2147483647 ms); `triggerPromptChars` 8000 characters, at most 163840 (the prompt is kept in one record entry (at most 983040 bytes), where JSON may escape a character to 6); `triggerRunRetentionMs` 2592000000 milliseconds, at most 9007199254740991 (the age is reckoned from the clock in a JavaScript number, exact up to 9007199254740991); `wakeMaxAheadMs` 2592000000 milliseconds, at most 9007199254740991 (the time is reckoned from the clock in a JavaScript number, exact up to 9007199254740991); `wakeNoteChars` 2000 characters, at most 163840 (the note is kept in one record entry (at most 983040 bytes), where JSON may escape a character to 6); `memoryBytes` 102400 bytes, at most 33554432 (a memory reaches a harness in one Harness API frame (67108864 bytes), as JSON, whose escapes may double it); `memoriesPerAgent` 10000 entries, at most 9007199254740991 (memories are counted in a JavaScript number, exact up to 9007199254740991); `memoryIndexLines` 200 entries, at most 9007199254740991 (the lines are counted in a JavaScript number, exact up to 9007199254740991); `memoryIndexBytes` 25600 bytes, at most 16777216 (the index crosses in turn.start, one Harness API frame (67108864 bytes), beside the harness's state and the rest); `webhookBodyBytes` 262144 bytes, at most 983040 (the payload goes into one record entry, which holds at most 983040 bytes); `sessionQueuedMessages` 100 entries, at most 9007199254740991 (queued messages are counted in a JavaScript number, exact up to 9007199254740991); `flowConcurrency` 8 effects, at most 9007199254740991 (running effects are counted in a JavaScript number, exact up to 9007199254740991); `flowMapItems` 1000 entries, at most 9007199254740991 (items are counted in a JavaScript number, exact up to 9007199254740991); `flowLoopIterations` 100 iterations, at most 9007199254740991 (iterations are counted in a JavaScript number, exact up to 9007199254740991); `folderFiles` 2000 entries, at most 5478274 (a folder's files arrive in one request body, read as one string of at most 536870888 characters, and each takes at least 98); `folderBytes` 52428800 bytes, at most 9007199254740991 (the files' sizes are added up in a JavaScript number, exact up to 9007199254740991); `folderTextFileBytes` 1048576 bytes, at most 536870888 (the compiler reads a file as one string, of at most 536870888 characters).