fix: add all ueberdb2 optional peer deps as direct dependencies

Add all 10 optional peer dependencies of ueberdb2@5.0.45 as direct
dependencies in src/package.json so every supported database backend
works out of the box in Docker:
- @elastic/elasticsearch ^9.3.4
- cassandra-driver ^4.8.0
- mongodb ^7.1.1
- mssql ^12.2.1
- nano ^11.0.5
- pg ^8.20.0
- redis ^5.12.1
- rethinkdb ^2.4.2
- surrealdb ^2.0.3

Agent-Logs-Url: https://github.com/ether/etherpad/sessions/60d96e2b-d8ea-42a2-8d7b-2d4ae52b4cff

Co-authored-by: JohnMcLear <220864+JohnMcLear@users.noreply.github.com>

src/package.json

@@ -30,8 +30,10 @@
     }
   ],
   "dependencies": {
+    "@elastic/elasticsearch": "^9.3.4",
     "async": "^3.2.6",
     "axios": "^1.15.0",
+    "cassandra-driver": "^4.8.0",
     "cookie-parser": "^1.4.7",
     "cross-env": "^10.1.0",
     "cross-spawn": "^7.0.6",
@@ -56,21 +58,28 @@
     "lru-cache": "^11.3.5",
     "measured-core": "^2.0.0",
     "mime-types": "^3.0.2",
+    "mongodb": "^7.1.1",
+    "mssql": "^12.2.1",
     "mysql2": "^3.22.0",
+    "nano": "^11.0.5",
     "oidc-provider": "9.8.2",
     "openapi-backend": "^5.16.1",
+    "pg": "^8.20.0",
     "prom-client": "^15.1.3",
     "proxy-addr": "^2.0.7",
     "rate-limiter-flexible": "^11.0.0",
+    "redis": "^5.12.1",
     "rehype": "^13.0.2",
     "rehype-minify-whitespace": "^6.0.2",
     "resolve": "1.22.12",
+    "rethinkdb": "^2.4.2",
     "rusty-store-kv": "^1.3.1",
     "security": "1.0.0",
     "semver": "^7.7.4",
     "socket.io": "^4.8.3",
     "socket.io-client": "^4.8.3",
     "superagent": "10.3.0",
+    "surrealdb": "^2.0.3",
     "swagger-ui-express": "^5.0.1",
     "tinycon": "0.6.8",
     "tsx": "4.21.0",