fix: resolve Docker build failures

- Add openai and zod to Docker build stage for TypeScript compilation
- Remove openai and zod from runtime package.json as they're not needed at runtime
- These packages are only used by fetch-templates script, not the MCP server

The metadata generation code is dynamically imported only when needed,
keeping the runtime Docker image lean.

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

package.runtime.json

@@ -9,9 +9,7 @@
     "dotenv": "^16.5.0",
     "sql.js": "^1.13.0",
     "uuid": "^10.0.0",
-    "axios": "^1.7.7",
-    "openai": "^4.77.0",
-    "zod": "^3.24.1"
+    "axios": "^1.7.7"
   },
   "engines": {
     "node": ">=16.0.0"