docs(09-02): complete recovery & resume E2E tests plan

Tasks completed: 2/2
- Create recovery/resume scenario tests
- Create extended agent Q&A scenario tests

SUMMARY: .planning/phases/09-extended-scenarios/09-02-SUMMARY.md

.planning/phases/09-extended-scenarios/09-02-SUMMARY.md

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+---
+phase: 09-extended-scenarios
+plan: 02
+subsystem: testing
+tags: [vitest, e2e, recovery, resume, qa-flow, state-persistence]
+
+# Dependency graph
+requires:
+  - phase: 08.1-02
+    provides: [MockAgentManager with schema-aligned scenarios, TestHarness convenience methods]
+provides:
+  - E2E tests for recovery/resume after interruption
+  - E2E tests for extended agent Q&A scenarios
+  - Proof that database is source of truth for state persistence
+affects: []
+
+# Tech tracking
+tech-stack:
+  added: []
+  patterns:
+    - Database as source of truth for task/queue state recovery
+    - Agent crash recovery with task re-dispatch
+
+key-files:
+  created:
+    - src/test/e2e/recovery-scenarios.test.ts
+  modified: []
+
+key-decisions:
+  - "Database state is source of truth, not in-memory queue state"
+  - "Blocked tasks can be unblocked by updating DB status and re-queueing"
+  - "Q&A flow tests use schema-aligned scenarios (done/question/unrecoverable_error)"
+
+patterns-established:
+  - "Recovery tests verify DB state persistence across operations"
+  - "Q&A tests verify full waiting->resumed->stopped state machine"
+
+# Metrics
+duration: 3min
+completed: 2026-01-31
+---
+
+# Phase 09 Plan 02: Recovery & Resume E2E Tests Summary
+
+**E2E tests proving recovery after interruption and extended agent Q&A flows work correctly with database as source of truth**
+
+## Performance
+
+- **Duration:** 3 min
+- **Started:** 2026-01-31T14:42:03Z
+- **Completed:** 2026-01-31T14:45:08Z
+- **Tasks:** 2
+- **Files modified:** 1
+
+## Accomplishments
+
+- 8 E2E tests proving recovery and Q&A scenarios work correctly
+- Recovery tests validating database as source of truth for state persistence
+- Q&A tests validating full agent:waiting -> agent:resumed -> agent:stopped state machine
+- All 34 E2E tests pass with no regressions
+
+## Task Commits
+
+Each task was committed atomically:
+
+1. **Task 1: Create recovery/resume scenario tests** - `62b13d8` (test)
+2. **Task 2: Create extended agent Q&A scenario tests** - `62b13d8` (test - combined with Task 1)
+
+Note: Both tasks implemented in single test file with two describe blocks.
+
+## Files Created/Modified
+
+- `src/test/e2e/recovery-scenarios.test.ts` - 8 tests across 2 describe blocks (Recovery after interruption, Agent Q&A extended scenarios)
+
+## Decisions Made
+
+1. **Database is source of truth**: Recovery tests verify that queue state survives because task status is persisted to DB, not just in-memory.
+2. **Blocked task recovery via DB update**: Since no `unblockTask` method exists, tests update task status via repository then re-queue.
+3. **Combined task implementation**: Both recovery and Q&A tests implemented in single file for cohesion.
+
+## Deviations from Plan
+
+None - plan executed exactly as written.
+
+## Issues Encountered
+
+None.
+
+## User Setup Required
+
+None - no external service configuration required.
+
+## Next Phase Readiness
+
+- All 34 E2E tests pass (6 happy path + 14 edge cases + 6 extended + 8 recovery/Q&A)
+- Phase 9 complete - all extended scenarios validated
+- v1.1 Test Infrastructure milestone complete
+
+---
+*Phase: 09-extended-scenarios*
+*Completed: 2026-01-31*