feat: update GraphQL compliance matrix and remove deprecated Apollo Federation dependency

Author: hotlong

docs/protocol-compliance-matrix.md

@@ -39,9 +39,9 @@ ObjectQL supports four primary API protocols, each designed for different use ca
 | Specification | REST | GraphQL | OData V4 | JSON-RPC |
 |--------------|------|---------|----------|----------|
 | **Standard** | HTTP/1.1 RFC 7231 | GraphQL 2021 | OData V4.01 | JSON-RPC 2.0 |
-| **Compliance Level** | ✅ 100% | ✅ 95% | ✅ 90% | ✅ 100% |
-| **Missing Features** | None | Federation | Delta Tokens | None |
-| **Custom Extensions** | None | Progress | Transaction Hints | SSE Progress |
+| **Compliance Level** | ✅ 100% | ✅ 100% | ✅ 90% | ✅ 100% |
+| **Missing Features** | None | None | Delta Tokens | None |
+| **Custom Extensions** | None | Progress, Federation 2 | Transaction Hints | SSE Progress |
 
 ### Query Capabilities
 

packages/protocols/graphql/package.json

@@ -17,7 +17,6 @@
     "test:watch": "vitest"
   },
   "dependencies": {
-    "@apollo/federation": "^0.38.1",
     "@apollo/server": "^4.10.0",
     "@apollo/subgraph": "^2.13.0",
     "@graphql-tools/schema": "^10.0.2",

packages/protocols/graphql/src/index.ts

@@ -686,7 +686,15 @@ export class GraphQLPlugin implements RuntimePlugin {
     private generateSchema(): string {
         const objectTypes = this.getMetaTypes();
 
-        let typeDefs = `#graphql
+        let typeDefs = `#graphql`;
+
+        if (this.config.enableFederation) {
+            typeDefs += `
+  extend schema @link(url: "https://specs.apollo.dev/federation/v2.3", import: ["@key", "@shareable"])
+`;
+        }
+        
+        typeDefs += `
   # Custom scalars
   """
   Represents arbitrary JSON values. Can be used for dynamic data structures.