feat(runtime): expand outcome reconciliation compatibility

[0YHR0]

Scope

A4.1b.2a expand-only compatibility release for future managed Runtime outcome reconciliation.

• teaches readers all four RECONCILE_RUNTIME_* TaskResolution actions
• teaches observation readers and ORM storage RECONCILED
• adds migration 0048 constraint parity
• exposes no reconciliation API, domain exit, service, provider call, or writer

Rollout / rollback

This PR must be merged and deployed before the writer slice. A clean 0048 -> 0047 downgrade is supported before writer activation. Once a later release persists the new values, 0048 is the schema floor and application rollback targets this compatibility release; audit evidence is never rewritten.

Validation

• ruff check . passed
• targeted compatibility/runtime/resolution/routes: 49 passed
• full pytest passed excluding the existing Windows sandbox named-pipe test (test_official_stdio_client_invokes_the_bundled_read_only_server); that isolated failure is WinError 5 before child launch
• PostgreSQL CI covers real reader round-trip and transactional schema-floor rollback evidence

Out of scope

No A4.1b.2b command writer, authority mutation, deployment, or gate activation.