feat : MCP server infrastructure setup

Install symfony/mcp-bundle, add STDIO + HTTP transport config,
API token auth on User entity with custom authenticator and firewall,
generate-api-token console command, Nginx /_mcp location, fixture token.

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

config/packages/mcp.yaml

@@ -0,0 +1,23 @@
+mcp:
+    app: 'lesstime'
+    version: '1.0.0'
+    description: 'Lesstime project management — projects, tasks, time tracking'
+    instructions: |
+        This server provides access to the Lesstime project management system.
+        You can list/create/update/delete projects, tasks, and time entries.
+        Tasks belong to projects and have statuses, priorities, efforts, tags, and groups.
+        Statuses, priorities, efforts, and tags are GLOBAL (shared across all projects).
+        Groups are PER-PROJECT (each group belongs to one project).
+        Time entries track work duration and can be linked to projects and tasks.
+        Use list-statuses, list-priorities, list-efforts, list-tags, list-groups to discover
+        available metadata before creating or updating tasks.
+        Use list-users and list-clients to discover valid user and client IDs.
+    client_transports:
+        stdio: true
+        http: true
+    http:
+        path: /_mcp
+        session:
+            store: file
+            directory: '%kernel.cache_dir%/mcp-sessions'
+            ttl: 3600

config/packages/security.yaml

@@ -28,6 +28,12 @@ security:
                 password_path: password
                 success_handler: lexik_jwt_authentication.handler.authentication_success
                 failure_handler: lexik_jwt_authentication.handler.authentication_failure
+        mcp:
+            pattern: ^/_mcp
+            stateless: true
+            provider: app_user_provider
+            custom_authenticators:
+                - App\Security\ApiTokenAuthenticator
         api:
             pattern: ^/api
             stateless: true
@@ -53,6 +59,7 @@ security:
         - { path: ^/api/docs, roles: PUBLIC_ACCESS }
         # Version de l'application en public
         - { path: ^/api/version, roles: PUBLIC_ACCESS, methods: [ GET ] }
+        - { path: ^/_mcp, roles: IS_AUTHENTICATED_FULLY }
         - { path: ^/api, roles: IS_AUTHENTICATED_FULLY }
 
 when@test:

config/routes/mcp.yaml

@@ -0,0 +1,3 @@
+mcp:
+    resource: .
+    type: mcp