fix: Add database persistence and health check scripts

- Add apply-migrations.sh for automatic migration application
- Add ensure-db-persistence.sh for database integrity checks
- Add db-health-check.sh for periodic health monitoring
- Improve PostgreSQL configuration in docker-compose.db.yml
- Add proper shutdown settings to prevent data loss

scripts/db-health-check.sh

@@ -0,0 +1,73 @@
+#!/bin/bash
+# Database health check and auto-recovery script
+# Run this periodically (e.g., via cron) to ensure database persistence
+
+set -e
+
+LOG_FILE="/var/log/db-health-check.log"
+TIMESTAMP=$(date '+%Y-%m-%d %H:%M:%S')
+
+log() {
+  echo "[$TIMESTAMP] $1" | tee -a "$LOG_FILE"
+}
+
+log "🔍 Starting database health check..."
+
+# Check if PostgreSQL container is running
+if ! docker ps | grep -q daarion-postgres; then
+  log "❌ PostgreSQL container is not running!"
+  exit 1
+fi
+
+# Check if database exists
+if ! docker exec daarion-postgres psql -U postgres -lqt | cut -d \| -f 1 | grep -qw daarion; then
+  log "⚠️  Database 'daarion' does not exist, creating..."
+  docker exec daarion-postgres psql -U postgres -c "CREATE DATABASE daarion;" || {
+    log "❌ Failed to create database"
+    exit 1
+  }
+fi
+
+# Check if critical tables exist
+TABLE_COUNT=$(docker exec daarion-postgres psql -U postgres -d daarion -t -c "SELECT COUNT(*) FROM information_schema.tables WHERE table_schema = 'public';" 2>/dev/null | tr -d ' ' || echo "0")
+
+if [ "$TABLE_COUNT" -lt 5 ]; then
+  log "⚠️  Database has only $TABLE_COUNT tables (expected 20+), applying migrations..."
+  cd /opt/microdao-daarion
+  for f in migrations/*.sql; do
+    log "  Applying $(basename $f)..."
+    docker exec -i daarion-postgres psql -U postgres -d daarion < "$f" 2>&1 | grep -v "already exists\|does not exist" || true
+  done
+  log "✅ Migrations applied"
+fi
+
+# Check for missing critical columns
+log "🔍 Checking for missing columns..."
+
+# Check banner_url
+if ! docker exec daarion-postgres psql -U postgres -d daarion -t -c "SELECT 1 FROM information_schema.columns WHERE table_name = 'microdaos' AND column_name = 'banner_url';" 2>/dev/null | grep -q 1; then
+  log "⚠️  Missing banner_url column, adding..."
+  docker exec daarion-postgres psql -U postgres -d daarion -c "ALTER TABLE microdaos ADD COLUMN IF NOT EXISTS banner_url TEXT;" || log "⚠️  Failed to add banner_url"
+fi
+
+# Check logo_url
+if ! docker exec daarion-postgres psql -U postgres -d daarion -t -c "SELECT 1 FROM information_schema.columns WHERE table_name = 'microdaos' AND column_name = 'logo_url';" 2>/dev/null | grep -q 1; then
+  log "⚠️  Missing logo_url column, adding..."
+  docker exec daarion-postgres psql -U postgres -d daarion -c "ALTER TABLE microdaos ADD COLUMN IF NOT EXISTS logo_url TEXT;" || log "⚠️  Failed to add logo_url"
+fi
+
+# Check data integrity
+MICRODAO_COUNT=$(docker exec daarion-postgres psql -U postgres -d daarion -t -c "SELECT COUNT(*) FROM microdaos;" 2>/dev/null | tr -d ' ' || echo "0")
+log "📊 MicroDAOs in database: $MICRODAO_COUNT"
+
+if [ "$MICRODAO_COUNT" -eq 0 ]; then
+  log "⚠️  No MicroDAOs found in database!"
+  log "💡 Consider restoring from backup: /opt/microdao-daarion/db_backups/"
+fi
+
+# Check volume persistence
+VOLUME_SIZE=$(du -sh /var/lib/docker/volumes/daarion_pgdata/_data/ 2>/dev/null | awk '{print $1}' || echo "unknown")
+log "📦 Database volume size: $VOLUME_SIZE"
+
+log "✅ Health check complete"
+