Three pr-reviewer followups from the 2026-07-07 review of commit ad14b56:
1. BUG: find_ack_orphans refactor routed 277ca/ta1 through
_ack_control_number which only knew 999 — restored per-kind source
(999 reads raw_json.envelope.control_number, 277ca/ta1 read the ORM
control_number column). Added regression test pinning all three
kinds.
2. DOCSTRING DRIFT: reconcile_orphan_st02s said 'remaining columns
take their defaults' but explicitly passes parsed_at and
transaction_set_control_number — added both to the explicit list
and clarified the rest take schema defaults.
3. WASTED SORT: _iter_orphan_999_st02s yielded sorted() but the
caller re-sorts by (-ack_count, st02) — yielding unsorted now.
Plus three cleanups the reviewer flagged:
* Hoisted 'json' / 'uuid' / 'datetime' imports to module top of
store/__init__.py (replaced in-method imports).
* Added two missing tests: sentinel grep-discoverability via
LIKE '<synthetic:%>' + 999-walk tolerance for non-dict raw_json
(None / list shapes — bytes is unreachable through the ORM).
* Aligned spec/plan exit codes to the cyclone-cli convention
(exit 1 on DB error, not 2 — matches the existing CLI
sys.exit(1) and the cyclone-cli skill documentation).
36/36 SP38 tests pass.
Nora