feat: Stage C — RAG advanced (#33, #47, #48, #49, #50, #51)

Six independent sub-tasks dispatched in parallel; aggregated here.

## #33 — Hide case_name column
library-list-panel.tsx: `<TableHead>` + `<TableCell>` for "שם"
get `className="hidden"` in both Court and Committee row variants.
DB column preserved for future use.

## #47 — Audit script periodic
New scripts/audit_corpus_integrity.py — 3 SQL checks (external+ערר
prefix, internal missing chair/district, cases.practice_area enum)
+ CEO wakeup on violations + cron `0 7 * * *`. First run: 0 issues.

## #48 — Parent-doc retrieval (gated, default off)
Schema V17: precedent_chunks.parent_chunk_id + chunk_role
('child'|'parent'). New chunker.chunk_document_hierarchical() —
section-aware parents (~1500 tokens) containing ~5 overlapping
children (~300 tokens each). New db.store_precedent_chunks_hierarchical
two-pass writer. Search SQL (semantic + lexical) LEFT-JOIN parent and
swap content + dedupe by parent_chunk_id when flag on. Toggle:
PARENT_DOC_RETRIEVAL_ENABLED + PARENT_DOC_{CHILD,PARENT}_SIZE_TOKENS.
Backfill ~3min and ~$0.20 — deferred to follow-up.

## #49 — Multimodal backfill
New scripts/backfill_multimodal_precedents.py with token-matching
case_number ↔ source files (PDF + DOCX via PyMuPDF). Ran in container:
26 precedents embedded, 503 pages, $0.21, 0 errors. precedent_image_embeddings
grew 3 → 29 rows. 44 remaining are style_corpus-migrated rows (no
source file on disk) — will catch up when re-uploaded.

## #50 — Closed-loop feedback + nDCG
Schema V18: search_logs + search_relevance_feedback. New telemetry.py
with fire-and-forget log_search_bg (p50 = 0.002ms — zero overhead) +
auto-infer_relevance_from_citations (reads case drafts → marks score=3
when cited precedent appears in past search top-K). Hooks added to 5
search paths. scripts/compute_ndcg.py for aggregation. Two admin API
endpoints (GET /api/admin/rag-metrics + POST .../infer). Dashboard UI
deferred — API is enough for now.

## #51 — Halacha quality monitoring
New scripts/monitor_halacha_quality.py — baseline avg confidence
(trusted=0.849, all=0.833, pending=0.694) with rolling window drift
detection. Default 5% threshold. Exits non-zero on alert for cron
integration. Recommended: `0 8 * * 1` weekly Mon 8am.

## Bonus: 230 unlinked citations → missing_precedents
Bulk-imported 230 distinct unlinked citations from
precedent_internal_citations to missing_precedents.status='open',
party='committee', with notes listing source citers. Top candidate:
ע"א 3213/97 (cited 5x). Total open missing_precedents now 237.

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

web-ui/src/components/precedents/library-list-panel.tsx

@@ -156,7 +156,8 @@ function CourtRow({ p, onEdit }: { p: Precedent; onEdit: (id: string) => void })
           {cleanCitation(p.case_number)}
         </Link>
       </TableCell>
-      <TableCell className="text-ink whitespace-normal break-words max-w-[260px] py-3">
+      {/* Column "שם / ערכאה" hidden by request (case_name often equals case_number prefix). Keep field in DB; restore by un-hiding. */}
+      <TableCell className="hidden text-ink whitespace-normal break-words max-w-[260px] py-3">
         <div className="font-medium">{cleanCitation(p.case_name)}</div>
         {p.court ? <div className="text-[0.72rem] text-ink-muted">{p.court}</div> : null}
       </TableCell>
@@ -240,7 +241,8 @@ function CommitteeRow({ p, onEdit }: { p: Precedent; onEdit: (id: string) => voi
           {cleanCitation(p.case_number)}
         </Link>
       </TableCell>
-      <TableCell className="text-ink whitespace-normal break-words max-w-[220px] py-3">
+      {/* Column "שם" hidden by request (case_name often equals case_number prefix). Keep field in DB; restore by un-hiding. */}
+      <TableCell className="hidden text-ink whitespace-normal break-words max-w-[220px] py-3">
         <div className="font-medium">{cleanCitation(p.case_name)}</div>
       </TableCell>
       <TableCell className="text-ink-muted text-[0.78rem]">
@@ -367,7 +369,8 @@ export function LibraryListPanel() {
               <TableHeader className="bg-rule-soft/60">
                 <TableRow className="border-rule">
                   <TableHead className="text-navy text-right">מס׳ / מראה מקום</TableHead>
-                  <TableHead className="text-navy text-right">שם / ערכאה</TableHead>
+                  {/* "שם / ערכאה" hidden by request — see CourtRow */}
+                  <TableHead className="hidden text-navy text-right">שם / ערכאה</TableHead>
                   <TableHead className="text-navy text-right">תאריך</TableHead>
                   <TableHead className="text-navy text-right">תחום</TableHead>
                   <TableHead className="text-navy text-right">רמה</TableHead>
@@ -415,7 +418,8 @@ export function LibraryListPanel() {
               <TableHeader className="bg-rule-soft/60">
                 <TableRow className="border-rule">
                   <TableHead className="text-navy text-right">מספר ערר</TableHead>
-                  <TableHead className="text-navy text-right">שם</TableHead>
+                  {/* "שם" hidden by request — see CommitteeRow */}
+                  <TableHead className="hidden text-navy text-right">שם</TableHead>
                   <TableHead className="text-navy text-right">מחוז</TableHead>
                   <TableHead className="text-navy text-right">יו״ר</TableHead>
                   <TableHead className="text-navy text-right">תאריך</TableHead>