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/console/v1/graphql/cookie_banner.graphql

@@ -205,6 +205,7 @@ type CookiePattern implements Node {
     source: CookieSource!
     excluded: Boolean!
     cookieCount: Int! @goField(forceResolver: true)
+    lastMatchedAt: Datetime
     createdAt: Datetime!
     updatedAt: Datetime!