Fix KMS memory leak

Adds a clean up method because KMS clients like GCP use a persistent connection snd if not closed, will continue to eat up the memory.

backend/src/services/auth/auth-login-service.ts

@@ -12,6 +12,7 @@ import { generateSrpServerKey, srpCheckClientProof } from "@app/lib/crypto";
 import { infisicalSymmetricEncypt } from "@app/lib/crypto/encryption";
 import { getUserPrivateKey } from "@app/lib/crypto/srp";
 import { BadRequestError, DatabaseError, ForbiddenRequestError, UnauthorizedError } from "@app/lib/errors";
+import { removeTrailingSlash } from "@app/lib/fn";
 import { logger } from "@app/lib/logger";
 import { getUserAgentType } from "@app/server/plugins/audit-log";
 import { getServerCfg } from "@app/services/super-admin/super-admin-service";
@@ -39,7 +40,6 @@ import {
   AuthTokenType,
   MfaMethod
 } from "./auth-type";
-import { removeTrailingSlash } from "@app/lib/fn";
 
 type TAuthLoginServiceFactoryDep = {
   userDAL: TUserDALFactory;

backend/src/services/kms/kms-service.ts

@@ -342,9 +342,12 @@ export const kmsServiceFactory = ({
       }
 
       return async ({ cipherTextBlob }: Pick<TDecryptWithKmsDTO, "cipherTextBlob">) => {
-        const { data } = await externalKms.decrypt(cipherTextBlob);
-
-        return data;
+        try {
+          const { data } = await externalKms.decrypt(cipherTextBlob);
+          return data;
+        } finally {
+          await externalKms.cleanup();
+        }
       };
     }
 
@@ -557,9 +560,12 @@ export const kmsServiceFactory = ({
       }
 
       return async ({ plainText }: Pick<TEncryptWithKmsDTO, "plainText">) => {
-        const { encryptedBlob } = await externalKms.encrypt(plainText);
-
-        return { cipherTextBlob: encryptedBlob };
+        try {
+          const { encryptedBlob } = await externalKms.encrypt(plainText);
+          return { cipherTextBlob: encryptedBlob };
+        } finally {
+          await externalKms.cleanup();
+        }
       };
     }