refactor: changed otp to use cache

package.json

@@ -20,7 +20,9 @@
     "test:e2e": "jest --config ./test/jest-e2e.json"
   },
   "dependencies": {
+    "@keyv/redis": "^5.1.6",
     "@nestjs/axios": "^4.0.1",
+    "@nestjs/cache-manager": "^3.1.3",
     "@nestjs/common": "^11.1.28",
     "@nestjs/config": "^4.0.4",
     "@nestjs/core": "^11.1.28",
@@ -31,9 +33,11 @@
     "@nestjs/typeorm": "^11.0.3",
     "axios": "^1.18.1",
     "bcrypt": "^6.0.0",
+    "cache-manager": "^7.2.9",
     "class-transformer": "^0.5.1",
     "class-validator": "^0.15.1",
     "joi": "^18.2.3",
+    "keyv": "^5.6.0",
     "ms": "^2.1.3",
     "passport": "^0.7.0",
     "passport-jwt": "^4.0.1",