Update prisma monorepo to v6

Author: renovate[bot]

api/package.json

@@ -39,7 +39,7 @@
         "jest": "29.7.0",
         "lint-staged": "^13.3.0",
         "nodemon": "^3.1.10",
-        "prisma": "^4.16.2",
+        "prisma": "^6.9.0",
         "ts-node": "^10.9.2",
         "tsconfig-paths": "^4.2.0",
         "typescript": "5.8.3"
@@ -51,7 +51,7 @@
         "@fastify/swagger-ui": "^1.10.2",
         "@hapi/boom": "^10.0.1",
         "@keplr/typed-ajv": "^3.0.5",
-        "@prisma/client": "^4.16.2",
+        "@prisma/client": "^6.9.0",
         "bcrypt": "^5.1.1",
         "dotenv": "^16.5.0",
         "fastify": "^4.29.1",