hakhel: the corpus read again on a cycle, counts engraved in L3 (bishe'arecha step 5)

Devarim 31:9–13, 26 — the scroll beside the ark as a witness, read before
all on a cycle. src/tools/hakhel.py reads the private specimen corpus and
the hand-labelled samples with the Korban Processor's readings at the
current commit and produces one record: fires per reading, forms standing
on two witnesses (the same rule as Bedikah.check_frames), precision and
recall on the hand labels, the corpus's SHA-256 — never a specimen.

POST /chatzer/hakhel (inner ring) engraves it in L3 `hakhel` (migration
20261013000001; refused above 256 KiB — counts, not specimens; the
Doorpost hash it was recorded under is kept). GET /peah/hakhel lists the
latest readings for anyone. KOHEN "The seventh day — Hakhel"; Tamid §1.1;
bishearecha §VIII marked built. The weekly cycle runs from the builder's
machine, where the corpus lives.

First dry reading at 0ade2c94: 3094 specimens, any reading 26 %, a form
stands 7 %, precision 46/59, recall 6/30. Doorpost 9f752a2f…. Elixir
599/0, L3 10/0.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

specs/bishearecha.md

@@ -247,7 +247,13 @@ the gate, with the result written to L3 (`hakhel` table: date, model,
 corpus hash, per-form counts, precision on the labelled samples). The
 corpus stays private; the counts do not.
 
-**Status.** Tools built; cycle and record not.
+**Status.** Built (2026-10-13): `src/tools/hakhel.py` reads the corpus
+and the hand-labelled samples with the readings at the current commit
+and posts counts to `POST /chatzer/hakhel`; L3 `hakhel` (migration
+20261013000001); `GET /peah/hakhel` for anyone. The cycle runs weekly
+from the builder's machine, where the corpus lives (Tamid §1.1).
+Reading each model through the gate on the cycle is still open — it
+spends the caller's key.
 
 ## IX. Lest your heart be seduced; lest you forget — Devarim 11:16, 8:11–17, 6:7
 
@@ -321,7 +327,7 @@ In the order the text argues it, and by dependency:
 4. **The gate** (I), with the fringe (III) and the rebuke (VII) — the
    architecture's centre; the first three make it worth standing at.
    *Done 2026-10-07.*
-5. **The hakhel cycle and record** (VIII).
+5. **The hakhel cycle and record** (VIII). *Done 2026-10-13.*
 6. **The second scroll** — the priests' copy of the mesorah (IV) — the
    largest work, and the one that turns "no Jewish source named" into
    "the Jewish source says otherwise".