feat(runtime): reconcile ambiguous managed outcomes

[0YHR0]

Summary\n- add the privileged, evidence-driven managed DIRECT outcome reconciliation writer behind managed_agent_runtime and outcome_reconciliation gates\n- atomically converge RuntimeExecution, Task, Run, latest Attempt, immutable observation evidence, TaskResolution, Outbox, idempotency, and transactional memory capture\n- support SUCCEEDED, FAILED, CANCELED, and TIMED_OUT evidence without provider dispatch; require a persisted cancel intent for business cancellation\n- preserve deadline approval, conservative budget settlement, and released quota without a second settlement\n- normalize malformed Runtime contract input to a bounded HTTP 422 and reject unsafe terminal evidence shapes\n\n## Safety properties\n- strict same-tenant parked Task/Run/Attempt/Runtime quartet and fence validation\n- canonical observation digest and assignment identity binding\n- exact idempotent replay; changed request, conflicting evidence, stale fence, and competing conclusions fail closed\n- no provider call or redispatch in reconciliation\n- compatibility migration 0048 and enum/schema expansion remain in main from #153; this PR adds no migration or enum value\n- writer gate remains disabled by default and the deployed direct-cutover gate is unchanged\n\n## Verification\n- 112 directed unit tests passed locally across task, managed runtime, Runtime domain, reconciliation service, and HTTP routes\n- repository-wide Ruff and git diff --check passed locally\n- CI unit coverage, quality, dependency review, CodeQL, Compose E2E, and the full real PostgreSQL/Redis integration suite all pass\n- PostgreSQL coverage proves atomic success/replay, rollback, competing conclusions, all terminal mappings, persisted cancel intent, deadline/budget/quota preservation, pre-existing evidence, stale fencing, zero redispatch, and clean compatibility-test isolation\n\n## Follow-up\n- #154 tracks applying the same terminal observation invariants to ordinary managed DIRECT finalization\n- reviewed/coordinated authority and production durable reattach remain outside A4.1b.2b\n