feat(graphql): Add subscriptions, input types, filtering, pagination, and DataLoader

- Add WebSocket support via graphql-ws for real-time subscriptions
- Implement strongly-typed Input Types for create/update mutations
- Add advanced filtering with StringFilter, IntFilter, BooleanFilter
- Implement Relay-style cursor pagination with Connection types
- Add DataLoader to prevent N+1 queries on relationships
- Support nested relationship queries (lookup/master_detail fields)
- Add subscription resolvers with filter support
- Implement PubSub system for real-time events
- Add OrderBy support for sorting
- Update dependencies: graphql-ws, ws, graphql-subscriptions, dataloader, express, cors

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

packages/protocols/graphql/package.json

@@ -20,10 +20,20 @@
     "@objectql/types": "workspace:*",
     "@objectstack/spec": "^0.7.1",
     "@apollo/server": "^4.10.0",
-    "graphql": "^16.8.1"
+    "graphql": "^16.8.1",
+    "graphql-ws": "^5.14.0",
+    "ws": "^8.14.0",
+    "graphql-subscriptions": "^2.0.0",
+    "dataloader": "^2.2.2",
+    "@graphql-tools/schema": "^10.0.2",
+    "express": "^4.18.2",
+    "cors": "^2.8.5"
   },
   "devDependencies": {
     "@objectstack/core": "^0.7.1",
+    "@types/ws": "^8.5.10",
+    "@types/express": "^4.17.21",
+    "@types/cors": "^2.8.17",
     "typescript": "^5.3.3",
     "vitest": "^1.0.4"
   },