feat(phase-6): Bulk CSV processing and background worker implementation

- Add BulkJob model to Prisma schema with relations
- Implement BulkProcessorService for CSV parsing and job management
- Create BulkTrackingWorker for background processing with BullMQ
- Add comprehensive bulk API routes (upload, jobs, progress, export)
- Integrate multer for CSV file uploads with validation
- Add job progress tracking and estimation
- Implement CSV export functionality for results
- Add queue statistics and cleanup endpoints
- Create shared types for bulk processing
- Add comprehensive test suite for all bulk functionality
- Implement graceful worker shutdown and error handling
- Add rate limiting and authentication for all bulk endpoints

Backward compatibility: Maintained for /api/track and /api/v1/track

apps/api/package.json

@@ -36,7 +36,10 @@
     "mermaid": "^10.6.1",
     "markdown-it": "^14.0.0",
     "file-type": "^19.0.0",
-    "mime-types": "^2.1.35"
+    "mime-types": "^2.1.35",
+    "csv-parser": "^3.0.0",
+    "csv-writer": "^1.6.0",
+    "multer": "^1.4.5-lts.1"
   },
   "devDependencies": {
     "@types/express": "^4.17.21",
@@ -55,6 +58,8 @@
     "@types/supertest": "^2.0.16",
     "@types/puppeteer": "^7.0.4",
     "@types/markdown-it": "^13.0.7",
-    "@types/mime-types": "^2.1.4"
+    "@types/mime-types": "^2.1.4",
+    "@types/multer": "^1.4.11",
+    "@types/csv-parser": "^3.0.0"
   }
 }