Add full decision writing pipeline: classify, extract, brainstorm, write, QA, export

New services (11 files):
- classifier.py: auto doc-type classification + party identification (Claude Haiku)
- claims_extractor.py: claim extraction from pleadings (Claude Sonnet + regex)
- references_extractor.py: plan/case-law/legislation detection (regex)
- brainstorm.py: direction generation with 2-3 options (Claude Sonnet)
- block_writer.py: 12-block decision writer (template + Claude Sonnet/Opus)
- docx_exporter.py: DOCX export with David font, RTL, headings
- qa_validator.py: 6 QA checks with export blocking on critical failure
- learning_loop.py: draft vs final comparison + lesson extraction
- metrics.py: KPIs dashboard per case and global
- audit.py: action audit log
- cli.py: standalone CLI with 11 commands

Updated pipeline: extract → classify → chunk → embed → store → extract_references
New MCP tools: 29 total (was 16)
New DB tables: audit_log, decisions CRUD, claims CRUD
Config: Infisical support, external service allowlist

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

scripts/backup-db.sh

@@ -0,0 +1,56 @@
+#!/bin/bash
+# גיבוי יומי אוטומטי למסד הנתונים PostgreSQL
+# Usage: ./backup-db.sh [backup_dir]
+# Cron: 0 2 * * * /home/chaim/legal-ai/scripts/backup-db.sh
+
+set -euo pipefail
+
+BACKUP_DIR="${1:-/home/chaim/legal-ai/data/backups}"
+TIMESTAMP=$(date +%Y%m%d_%H%M%S)
+BACKUP_FILE="${BACKUP_DIR}/legal_ai_${TIMESTAMP}.sql.gz"
+
+# Load DB credentials from .env
+source "${HOME}/.env" 2>/dev/null || true
+
+DB_HOST="${POSTGRES_HOST:-127.0.0.1}"
+DB_PORT="${POSTGRES_PORT:-5433}"
+DB_NAME="${POSTGRES_DB:-legal_ai}"
+DB_USER="${POSTGRES_USER:-legal_ai}"
+
+# Create backup directory
+mkdir -p "${BACKUP_DIR}"
+
+echo "[$(date)] Starting backup: ${BACKUP_FILE}"
+
+# Dump and compress
+PGPASSWORD="${POSTGRES_PASSWORD:-}" pg_dump \
+    -h "${DB_HOST}" \
+    -p "${DB_PORT}" \
+    -U "${DB_USER}" \
+    -d "${DB_NAME}" \
+    --format=custom \
+    --compress=9 \
+    -f "${BACKUP_FILE%.gz}"
+
+gzip "${BACKUP_FILE%.gz}" 2>/dev/null || true
+
+echo "[$(date)] Backup completed: ${BACKUP_FILE}"
+
+# Verify backup
+if [ -f "${BACKUP_FILE}" ]; then
+    SIZE=$(du -h "${BACKUP_FILE}" | cut -f1)
+    echo "[$(date)] Backup size: ${SIZE}"
+else
+    # pg_dump --format=custom already compresses
+    BACKUP_FILE="${BACKUP_FILE%.gz}"
+    SIZE=$(du -h "${BACKUP_FILE}" | cut -f1)
+    echo "[$(date)] Backup size: ${SIZE} (custom format)"
+fi
+
+# Cleanup: keep last 30 days
+find "${BACKUP_DIR}" -name "legal_ai_*.sql*" -mtime +30 -delete 2>/dev/null
+echo "[$(date)] Old backups cleaned (>30 days)"
+
+# Count remaining backups
+COUNT=$(find "${BACKUP_DIR}" -name "legal_ai_*" | wc -l)
+echo "[$(date)] Total backups: ${COUNT}"