chore(main): release 7.183.0

[github-actions]

Execution-attempt tracing and task-cost cohorts (issue #2676)

What changed

• New execution_attempt_recorded observability event (65th catalogued
  kind): ONE event per execution attempt, bound to the exact task, call,
  invocation, and generation identity the producer holds, with a closed
  attempt-class vocabulary (denial / attempt / result / duplicate /
  late / cancelled / provider_failed), explicit capture coverage
  (captured / unknown lists), and a per-attempt cost block whose unknown
  axes are strictly null plus an unavailable list entry — never 0.
• Envelope correlation axes callId + invocationId added to
  WorkflowIdsSchema (13 → 15 recognized IDs): exact-call and invocation
  joins are now first-class correlation axes; Stage A callers' PascalCase
  sessionID/callID are normalized at the recorder.
• Producers wired: the delegation lifecycle begin/terminal observers
  (classes attempt, result, cancelled; latency from the dispatch start,
  tokens only when the cost-evidence chain held usage, estimated-vs-billed
  from cost_source) and the Stage A gate route hook (classes denial,
  result, late with the correlation's threaded generation cursor, and
  duplicate — production duplicate_result routes stay fail-open drops
  because the seam holds no original record identity; the class is recordable
  when a caller supplies duplicateOf).
• Cohort machinery (src/services/task-cohort.ts): a DEEP-copied
  population snapshot with capturedAt (post-snapshot mutation cannot change
  a reported denominator), frozen provenance manifests for the trigger /
  WAL / event / host-status sources (bounded 64 KiB digests; missing sources
  are explicit unavailable), configuration/version strata, a computed
  uncertainty channel (present whenever the sample is below threshold, any
  cost axis is unavailable, or any outcome is missing), and an explicit
  causal-rate qualification verdict. Snapshots persist one bounded
  FIFO-20 manifest under .swarm/observability/cohorts/ (retention-registry
  row observability-cohorts).
• /swarm report gains a "Task attempts (cohort)" section (--json
  schema version 2): per-class counts, cost known/unavailable split,
  uncertainty, and the qualification line. Existing pairing/savings sections
  are unchanged and documented as descriptive operational counts.
• Docs: docs/execution-attempt-tracing.md defines the event vocabulary,
  manifest schema, cohort inclusion rules, and the operational-counts vs
  causal-rate-claims boundary; the event contract doc gains the kind section
  and the two new correlation axes.

Why

Execution traces and task-cost measurements could not support causal claims
about retries, quality, latency, or cost: records were joined only at
session/task level (the call identity died at the envelope boundary),
denial/attempt/result/duplicate/late had no shared representation, unknown
token counts collapsed to zero in the legacy fold, and no cohort machinery
existed to qualify aggregate claims. Issue #2676 (Workstream D16).

Disclosed residual

The legacy delegation_end fold (src/telemetry.ts token ?? 0 defaults;
src/services/cost-accounting.ts readNumber(...) ?? 0) still zero-defaults
absent usage on ITS surface — a pre-existing conflation tracked by a filed
follow-up issue. The new execution_attempt_recorded surface is immune by
construction and never routes unknowns through that path.

🤖 I have created a release beep boop

7.183.0 (2026-09-15)

Features

• observability: bind execution traces and task-cost metrics to exact attempts (#2676) (114338f)

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This PR was generated with Release Please. See documentation.

[github-actions]

Drift check report

Found 2 drift finding(s): 0 error, 0 warning, 2 notice.

required-check-contract (2)

• 🔵 notice scripts/required-check-contract.json: [RULESET_DIVERGENCE] intended-required context "drift" is not yet required by the captured ruleset
• 🔵 notice scripts/required-check-contract.json: [RULESET_DIVERGENCE] intended-required context "drift" is not present for every expected event in captured external workflow evidence

[github-actions]

🤖 Created releases:

• v7.183.0

🌻