chore(schema): migrate to GORM V2 with multi-database support

- [x] Implement GORM V2 metadata store with SQLite, PostgreSQL, and MySQL support
- [x] Add database migration system using gormigrate for schema versioning
- [x] Create migration CLI tool with support for migrate, rollback, and status commands
- [x] Add Docker support for migration container (Dockerfile.migrate)
- [x] Implement automatic partition management for PostgreSQL time-series tables
- [x] Add background aggregation worker for download statistics
- [x] Support connection pooling configuration (max_open_conns, max_idle_conns, conn_max_lifetime)
- [x] Add blocking mechanism based on vulnerability thresholds in stats and handlers
- [x] Update Helm charts with migration init containers and multi-database configuration
- [x] Replace deprecated SQLite store with optimized GORM implementation
- [x] Add comprehensive integration tests for MySQL and PostgreSQL
- [x] Update frontend to display blocked packages and storage utilization
- [x] Add goreleaser configuration for migrate binary and container image
- [x] Update configuration examples with database backend options and recommendations

frontend/src/components/VulnerabilityBadge.vue

@@ -1,5 +1,15 @@
 <template>
   <div class="flex items-center gap-2">
+    <!-- Blocked Icon (if package exceeds thresholds) -->
+    <span
+      v-if="isBlocked"
+      class="inline-flex items-center px-2.5 py-1 rounded-md text-xs font-medium bg-red-600 text-white border border-red-700"
+      title="Download blocked - exceeds vulnerability thresholds"
+    >
+      <i class="fas fa-hand mr-1"></i>
+      BLOCKED
+    </span>
+
     <!-- Critical Vulnerabilities -->
     <button
       v-if="counts.critical > 0"
@@ -89,12 +99,14 @@ interface Props {
   counts?: VulnerabilityCounts
   total?: number
   scannedAt?: string // ISO 8601 timestamp
+  isBlocked?: boolean // Whether download is blocked due to vulnerabilities
 }
 
 const props = withDefaults(defineProps<Props>(), {
   scanned: false,
   status: 'not_scanned',
   total: 0,
+  isBlocked: false,
 })
 
 const emit = defineEmits<{