Phase 2 review corrections — three spec violations fixed

1. Chatzotzrot signal mapping corrected to match Architecture §3.12:
   assembly_all→tekiah, assembly_leaders→teruah,
   breaking_camp→tekiah_teruah, moadim→tekiah_tekiah.
   Four of five patterns were swapped. All five now match Bamidbar 10.

2. Manna parse_datetime(nil) bug fixed: missing expires_at now fails
   validation instead of silently returning DateTime.utc_now() which
   created a race condition where manna appeared expired.

3. Festival detection implemented in cloud.ex: pre-computed Gregorian
   dates for Pesach, Shavuot, Rosh Hashanah, Yom Kippur, Sukkot,
   Shemini Atzeret (2025-2028). Pipeline now halts on Yom Tov as
   Torah requires. Step 15 verification now covers festival rest.

76 tests, 0 failures (68 prior + 8 new).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

memory/build_log.md

@@ -631,3 +631,53 @@ Elixir (BEAM VM)                  External Processes
 │   (direct call)             │      └─ escalation:submit_case/1
 └─────────────────────────────┘
 ```
+
+---
+
+## Session: 2026-03-12 — Step 15: Verification (The Shema Test)
+
+**Spec reference:** Architecture §4 Phase 2 step 15, §6.3 (The Shema Test)
+
+### What Was Built
+
+**Code change:** Wired `HaltConditions.check_all/1` into `BereishitCycle.erev_voker/2`. Previously dead code — the three cardinal sin monitors existed but were never called during pipeline execution. Now `erev_voker` checks halt conditions on the final result before returning.
+
+**Test suite:** `vav_pipeline/test/step15_shema_test.exs` — 22 tests implementing Architecture §6.3:
+
+| Test Group | Count | Spec |
+|------------|-------|------|
+| Te'amim reception | 4 | §6.3 Test 1 |
+| Ketiv/qere preservation | 4 | §6.3 Test 2 |
+| Cloud obedience | 3 | §6.3 Test 3 |
+| Manna fidelity | 2 | §6.3 Test 4 |
+| Context immutability | 1 | §6.3 Test 5 |
+| Halt condition integration | 5 | §6.2 |
+| Full pipeline end-to-end | 3 | §6.2 |
+
+**Result:** 68 tests, 0 failures (46 existing + 22 new).
+
+### Key Finding
+
+`HaltConditions.check_all/1` was dead code. It existed, had unit tests, but was never called in the pipeline. Step 15 made it live by inserting `check_halt_on_output/1` into `erev_voker`. This is the correct location — halt conditions are checked on the cycle's output, not its input.
+
+### Files
+
+| File | Action |
+|------|--------|
+| `vav_pipeline/lib/vav_pipeline/bereishit_cycle.ex` | Modified — halt check in erev_voker |
+| `vav_pipeline/test/step15_shema_test.exs` | Created — 22 tests |
+
+### Phase 2 Status
+
+Steps 8-15 complete. Phase 2 (Processing) is done.
+
+| Step | Status |
+|------|--------|
+| 8. Vav Pipeline | Done |
+| 9. Shema context builder | Done |
+| 10. Cloud governance | Done |
+| 11. Manna provision | Done |
+| 12. Sanhedrin framework | Done |
+| 13. Korban Processor | Done |
+| 14. Connect components | Done |
+| 15. Verification | Done |