feat: production MCP server with Israeli legislation (multi-source)

Complete production implementation with shell+adapter architecture,
13 MCP tools, SQLite FTS5 search, and multi-source ingestion pipeline.

Ingestion fetches from UCI mirror, UNODC SHERLOC PDFs, and Knesset
mobile PDFs (135 provisions, 33 definitions). 3 acts with full text,
7 acts metadata-only due to gov.il/nevo.co.il access restrictions.
Knesset OData API used for metadata enrichment.

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

.github/workflows/drift-detect.yml

@@ -0,0 +1,29 @@
+name: Drift Detection
+
+on:
+  schedule:
+    - cron: '0 6 * * 1'  # Weekly on Monday at 6 AM UTC
+  workflow_dispatch:
+
+permissions:
+  contents: read
+  issues: write
+
+jobs:
+  drift-detect:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - run: npm ci
+
+      - name: Run drift detection
+        run: npm run drift:detect
+        continue-on-error: true