docs(plugins): complete unavailable release integration

.project-docs/30-worklog/tasks/20260902-web-search-client-integration-a4c8e291.md

@@ -71,6 +71,8 @@
   product trees match for the resolver/test/source-record change.
 - Canonical current state now records the corrected unavailable-Release diagnostic and
   keeps the server migration/Provider readiness requirements explicit.
+- The feature task record remains on its isolated source branch and was removed from
+  the root integration history checkpoint, as required by the Integration Gate.
 - The two pre-existing untracked package records remain present and unmodified. No
   installed application, project, Account Library, server, package, or external state
   was changed.
@@ -81,8 +83,8 @@
   ESLint, diff gate, and feature task documentation gate passed.
 - Post-integration rerun on exact `main`: the same 3 files / 25 tests passed;
   `pnpm exec tsc --noEmit`, scoped ESLint, and `git diff --check` passed.
-- Integration task-aware document drift and ownership completion are required before
-  closure.
+- Integration task-aware document drift passed, and `task_context complete` returned
+  `READY_FOR_INTEGRATION`.
 
 ## Follow-ups