feat: add IP-based rate limiter (swc/jest replaces ts-jest for TS7 compat)

package.json

@@ -20,7 +20,7 @@
   "jest": {
     "testEnvironment": "node",
     "transform": {
-      "^.+\\.tsx?$": "ts-jest"
+      "^.+\\.tsx?$": "@swc/jest"
     },
     "moduleNameMapper": {
       "^@/(.*)$": "<rootDir>/src/$1"
@@ -34,13 +34,18 @@
   "license": "ISC",
   "type": "commonjs",
   "dependencies": {
+    "@prisma/adapter-mariadb": "^7.9.1",
     "@prisma/client": "^7.9.1",
+    "dotenv": "^17.4.2",
+    "mariadb": "^3.5.3",
     "next": "^16.3.0",
     "prisma": "^7.9.1",
     "react": "^19.2.8",
     "react-dom": "^19.2.8"
   },
   "devDependencies": {
+    "@swc/core": "^1.15.47",
+    "@swc/jest": "^0.2.39",
     "@types/jest": "^30.0.0",
     "@types/node": "^26.2.0",
     "@types/react": "^19.2.18",