fix(agent-core-v2): adopt the replayed turn outcome on restore

[elkaix]

Related Issue

Follow-up to #213, from the review discussion on reconcileAfterRestore.

Problem

SessionOutcomeMirror persists the last turn outcome (completed / failed / cancelled) into the session metadata. On restore it only reconciled one stale case: a persisted outcome with no ended turn on the replayed wire. If the persisted value itself went stale — the async metadata write never landed before shutdown — a session whose last turn had actually completed still resumed showing "manually stopped" (or a failed badge), because the replayed wire had an ended turn and the reconcile kept whatever was on disk.

What changed

• sessionOutcomeMirrorService.ts: after restore, when the replayed lastEnded reason is unambiguous, adopt it with touchUpdatedAt: false and track its turn id for the undo range check: completed → completed, failed / blocked → failed. A replayed cancelled is deliberately left alone: the wire carries no interruptReason, so it cannot distinguish a user stop from a programmatic abort, and only user stops are ever persisted.
• Tests: stale cancelled replaced by replayed completed; replayed blocked maps to failed; replayed cancelled keeps the persisted completed; the adopted turn id feeds the undo range check.

Verification

• pnpm --filter @pymodel/agent-core-v2 exec vitest run — 347 files, 5,723 tests passed
• typecheck, tsgo, lint:imports, check-no-comments, oxlint on the changed files — all exit 0

Checklist

• I have read the CONTRIBUTING document.
• I have linked a related issue (external PRs: the issue must have a maintainer's /approve).
• I have added tests that prove my feature works.
• Ran gen-changesets skill, or this PR needs no changeset.
• Ran gen-docs skill, or this PR needs no doc update.

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📥 Commits

Reviewing files that changed from the base of the PR and between 0753f13 and 133808a.

📒 Files selected for processing (3)

• .changeset/restore-reconciles-turn-outcome.md
• packages/agent-core-v2/src/session/sessionActivity/sessionOutcomeMirrorService.ts
• packages/agent-core-v2/test/session/sessionActivity/sessionOutcomeMirror.test.ts

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commit: 133808a