Adds unit tests for all services

package.json

@@ -10,7 +10,7 @@
     "test": "jest"
   },
   "dependencies": {
-    "@aws-sdk/client-kms": "^3.716.0",
+    "@aws-sdk/client-kms": "^3.968.0",
     "@nestjs/common": "^10.4.15",
     "@nestjs/config": "^3.3.0",
     "@nestjs/core": "^10.4.15",
@@ -20,16 +20,28 @@
     "execa": "^9.5.2",
     "joi": "^17.9.0",
     "js2xmlparser": "^5.0.0",
+    "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.0",
     "sqlite3": "^5.1.6"
   },
   "devDependencies": {
+    "@aws-sdk/client-iam": "^3.969.0",
+    "@aws-sdk/client-s3": "^3.968.0",
+    "@aws-sdk/client-secrets-manager": "^3.968.0",
+    "@aws-sdk/client-sns": "^3.968.0",
+    "@aws-sdk/client-sqs": "^3.968.0",
+    "@aws-sdk/client-sts": "^3.969.0",
     "@nestjs/cli": "^10.4.9",
+    "@nestjs/testing": "10.4.15",
     "@types/express": "^4.17.17",
+    "@types/jest": "^30.0.0",
     "@types/joi": "^17.2.2",
     "@types/node": "^22.10.2",
+    "aws-sdk-client-mock": "^4.1.0",
     "eslint": "^8.36.0",
-    "prisma": "^6.1.0"
+    "jest": "^30.2.0",
+    "prisma": "^6.1.0",
+    "ts-jest": "^29.4.6"
   },
   "engines": {
     "node": ">=22.11.0",