Refactor database interactions to use Drizzle ORM

- Replaced direct SQLite database calls with Drizzle ORM methods in `top-monthly-sold-by-category.ts`, `writer.ts`, and `upc-file-analysis.ts`.
- Updated test cases in `top-monthly-sold-by-category.test.ts` to mock the new database interactions.
- Removed unnecessary database initialization and cleanup code.
- Improved code readability and maintainability by using ORM features for inserting and updating records.

package.json

@@ -14,18 +14,23 @@
     "start": "bun run src/index.ts",
     "start:web": "bun --hot src/server.ts",
     "build:web": "bun build src/web/index.html --outdir dist",
-    "test": "bun test"
+    "test": "bun test",
+    "db:generate": "drizzle-kit generate",
+    "db:migrate": "drizzle-kit migrate"
   },
   "devDependencies": {
     "@types/bun": "latest",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
+    "drizzle-kit": "^0.31.10",
     "typescript": "^6.0.3"
   },
   "dependencies": {
     "amazon-sp-api": "^1.2.1",
+    "drizzle-orm": "^0.45.2",
     "exceljs": "^4.4.0",
     "ioredis": "^5.10.1",
+    "postgres": "^3.4.9",
     "react": "^19.2.0",
     "react-dom": "^19.2.0",
     "xlsx": "^0.18.5"