fix: backend/package.json & backend/package-lock.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-FASTIFY-9788069
- https://snyk.io/vuln/SNYK-JS-SNOWFLAKESDK-9901392

backend/package.json

@@ -181,7 +181,7 @@
     "cron": "^3.1.7",
     "dd-trace": "^5.40.0",
     "dotenv": "^16.4.1",
-    "fastify": "^4.28.1",
+    "fastify": "^4.29.1",
     "fastify-plugin": "^4.5.1",
     "google-auth-library": "^9.9.0",
     "googleapis": "^137.1.0",
@@ -227,7 +227,7 @@
     "scim2-parse-filter": "^0.2.10",
     "sjcl": "^1.0.8",
     "smee-client": "^2.0.0",
-    "snowflake-sdk": "^1.14.0",
+    "snowflake-sdk": "^2.0.4",
     "tedious": "^18.2.1",
     "tweetnacl": "^1.0.3",
     "tweetnacl-util": "^0.15.1",