Surface last_matched_at on all API surfaces

Add lastMatchedAt to the CookiePattern GraphQL type, MCP schema,
CLI view/list commands, and n8n get/getAll operations. Run
codegen to regenerate gqlgen models and MCP types.

Signed-off-by: Émile Ré <emile@getprobo.com>

pkg/server/api/mcp/v1/specification.yaml

@@ -9185,6 +9185,12 @@ components:
         excluded:
           type: boolean
           description: Whether this pattern is excluded from the consent banner
+        last_matched_at:
+          type:
+            - string
+            - "null"
+          format: date-time
+          description: Timestamp when a cookie last matched this pattern
         created_at:
           type: string
           format: date-time