Add ECDSA signature verification and enhance ComboHandler functionality

- Integrated ECDSA for signature verification in ComboHandler.
- Updated event emissions to include additional parameters for better tracking.
- Improved gas tracking during execution of combo plans.
- Enhanced database interactions for storing and retrieving plans, including conflict resolution and status updates.
- Added new dependencies for security and database management in orchestrator.

orchestrator/package.json

@@ -7,18 +7,27 @@
     "build": "tsc",
     "dev": "ts-node src/index.ts",
     "start": "node dist/index.js",
-    "test": "jest"
+    "test": "jest",
+    "migrate": "ts-node src/db/migrations/index.ts"
   },
   "dependencies": {
     "express": "^4.18.2",
     "uuid": "^9.0.1",
-    "cors": "^2.8.5"
+    "cors": "^2.8.5",
+    "express-rate-limit": "^7.1.5",
+    "helmet": "^7.1.0",
+    "zod": "^3.22.4",
+    "pg": "^8.11.3",
+    "pino": "^8.16.2",
+    "pino-pretty": "^10.2.3",
+    "prom-client": "^15.1.0"
   },
   "devDependencies": {
     "@types/express": "^4.17.21",
     "@types/node": "^20.10.0",
     "@types/uuid": "^9.0.6",
     "@types/cors": "^2.8.17",
+    "@types/pg": "^8.10.9",
     "typescript": "^5.3.3",
     "ts-node": "^10.9.2"
   }