feat: add MCP server, A2A protocol, auto-combo engine & VS Code extension

Introduce full AI orchestration ecosystem:
- MCP Server with 16 tools, scoped auth, and audit logging
- A2A v0.3 server with JSON-RPC 2.0, SSE streaming, and task manager
- Auto-Combo engine with 6-factor scoring and self-healing
- VS Code extension with smart dispatch and budget tracking
- Harden CI pipeline: add static checks, remove continue-on-error
- Add translator schema validation tests
- Update .gitignore and CHANGELOG for release checklist

.github/workflows/ci.yml

@@ -22,6 +22,12 @@ jobs:
           cache: npm
       - run: npm ci
       - run: npm run lint
+      - run: npm run check:cycles
+      - run: npm run check:route-validation:t06
+      - run: npm run check:any-budget:t11
+      - run: npm run check:docs-sync
+      - run: npm run typecheck:core
+      - run: npm run typecheck:noimplicit:core
 
   security:
     name: Security Audit
@@ -127,7 +133,6 @@ jobs:
           cache: npm
       - run: npm ci
       - run: npm run test:integration
-        continue-on-error: true
 
   test-security:
     name: Security Tests
@@ -144,4 +149,3 @@ jobs:
           cache: npm
       - run: npm ci
       - run: npm run test:security
-        continue-on-error: true