fix(config) : disable uninstalled McpBundle to fix boot crash

McpBundle was registered but symfony/ai-mcp-bundle is not installed,
causing a critical error on boot. Disabled all MCP references:
- bundles.php: removed McpBundle
- mcp.yaml: renamed to mcp.yaml.disabled
- routes.yaml: removed mcp route
- services.yaml: commented McpHeaderAuthenticator, excluded src/Mcp/
- security.yaml: commented mcp firewall and access control
- phpunit.dist.xml: excluded tests/Mcp

All marked with TODO for re-enabling when the package is installed.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

config/packages/security.yaml

@@ -27,11 +27,12 @@ security:
             pattern: ^/api/session/profiles?$
             security: false
 
-        mcp:
-            pattern: ^/_mcp
-            stateless: true
-            custom_authenticators:
-                - App\Mcp\Security\McpHeaderAuthenticator
+        # TODO: re-enable when symfony/ai-mcp-bundle is installed
+        # mcp:
+        #     pattern: ^/_mcp
+        #     stateless: true
+        #     custom_authenticators:
+        #         - App\Mcp\Security\McpHeaderAuthenticator
 
         api:
             pattern: ^/api
@@ -55,7 +56,7 @@ security:
         - { path: ^/api/admin, roles: ROLE_ADMIN }
         - { path: ^/api/docs, roles: PUBLIC_ACCESS }
         - { path: ^/api/health$, roles: PUBLIC_ACCESS }
-        - { path: ^/_mcp, roles: ROLE_USER }
+        # - { path: ^/_mcp, roles: ROLE_USER }  # TODO: re-enable with MCP
         - { path: ^/docs, roles: PUBLIC_ACCESS }
         - { path: ^/contexts, roles: PUBLIC_ACCESS }
         - { path: ^/\.well-known, roles: PUBLIC_ACCESS }