Cross-model re-review of Commit A Section 6 (startup reconciler) after applying your previous Round-1 findings. Use read-only shell commands (cat, sed, rg, nl, git diff, ls, head, tail, grep). No writes, no tests.

Round-1 verdict was NEEDS_FIXES with 3 BUG + 1 WARN. This round verifies the fixes landed correctly and nothing new regressed.

ROUND-1 FIX MATRIX:

[FIX BUG 3] feishu_bridge/bg_supervisor.py reconcile() healthy-DB branch:
  - Changed `conn = connect(resolved_path)` → `conn = init_db(resolved_path)` so
    schema migrations run before any recovery UPDATE hits older schema columns.
  - `init_db()` is idempotent; no extra DDL cost on up-to-date DBs (see
    `_schema_up_to_date` pre-check at bg_tasks_db.py:249).

[FIX WARN] feishu_bridge/bg_supervisor.py reconcile() top-level docstring
  step 5 no longer claims "worker CAS loses cleanly" (that claim contradicted
  worker.py:927 which discards _bg_mark_dequeued()'s return value). New text
  points to `_reset_stranded_enqueued` for the full single-bridge-per-home
  argument and the accepted launchd-reload-overlap edge case.

[FIX BUG 1] feishu_bridge/bg_tasks_db.py _replay_completed_manifest():
  - Now reads canonical manifest keys written by task_runner.py:212
    (`started_at_ms` / `finished_at_ms`), falling back to plain `started_at`
    / `finished_at` for legacy manifests and test fixtures.
  - Now decodes `stdout_tail_b64` / `stderr_tail_b64` via `base64.b64decode`
    and writes them to the new bg_runs.stdout_tail / stderr_tail columns.
  - Added `import base64` at top of bg_tasks_db.py.
  - New regression test test_rebuild_from_manifests_uses_canonical_manifest_schema
    in tests/unit/test_bg_tasks_db.py asserts timestamps and tails round-trip.

[DEFERRED BUG 2] "bg_tasks row exists but bg_runs row missing" case.
  Pre-existing gap in quarantine recovery; Commit A did NOT widen its exposure
  (quarantine is still only triggered on integrity_check failure, not on every
  boot). Deferred to a targeted follow-up commit. Please confirm this
  deferral is acceptable given the scope of Commit A.

UNCHANGED FROM ROUND 1:
  - reconcile() 7-step orchestration
  - _reap_stale_launching / _warn_running_rows / _reset_stranded_enqueued helpers
  - main.py calls self._bg_supervisor.reconcile() BEFORE .start()
  - tests/unit/test_bg_supervisor.py 13 reconciler tests (all green)
  - tasks.md §6.1=[~], §6.2/6.4/6.5=[x]

KEY QUESTIONS:

Q1: Does BUG 3 fix correctly sequence schema migration before recovery?
    Specifically: on a v1-schema DB, does init_db(resolved_path) complete
    migrate() before the subsequent _reap_stale_launching / rebuild_from_manifests
    queries touch v2 columns like thread_id?

Q2: Does BUG 1 fix correctly handle both schema forms? Check that
    (a) canonical manifests (started_at_ms) produce correct bg_runs.started_at
    (b) legacy fixtures (started_at) still work
    (c) missing/null finished_at_ms in a "completed" manifest is stored as NULL
    (d) b64-decoded tails match original bytes

Q3: Is the deferral of BUG 2 to a follow-up defensible?
    Specifically: does reconcile()'s live-DB rebuild_from_manifests() call
    (step 4) ever produce a state where bg_tasks exists but bg_runs is missing,
    on a healthy (non-quarantined) DB? If no, deferral is safe.

Q4: Any new concerns introduced by the fixes themselves? E.g.:
    - Does init_db() on every reconcile cause contention with other connections?
    - Does the `_decode_tail` helper silently swallow errors that should surface?

PRODUCE:
- Numbered findings list, each labeled [BUG] / [WARN] / [STYLE]
- If no issues, explicit PASS per area (Q1/Q2/Q3/Q4)
- End with EXACTLY one line: VERDICT: APPROVED | NEEDS_FIXES | BLOCK
