docs: record extension update rollback

.project-docs/30-worklog/tasks/20260903-backup-revert-extension-update-c71a4e92.md

@@ -8,7 +8,7 @@
 - Worktree: /Users/inmanx/Documents/lwltAPI-finalize-extension-update-a6c4e192
 - Base commit: b2e33e2e5d29138891eabc93969cf24907492dfe
 - Owner: codex
-- Status: Planning
+- Status: Integrated and pushed
 
 ## Scope
 
@@ -31,7 +31,9 @@
 - Remote backup branch `codex/backup-extension-update-20260903-b2e33e2` was created first and independently verified at exact commit `b2e33e2e5d29138891eabc93969cf24907492dfe`.
 - Reverted merge `3224758` in the isolated Integration worktree while retaining both source task records and the former integration record. Product source, dependencies, migration readiness, extension source, release package, mappings, tests, and operational documentation now match the pre-iteration `f52d9d7` tree exactly.
 - Restored extension `0.5.165`, release ZIP SHA-256 `14f3150ab26d99131e32321ddc805a85550438bc2810a1e20921f7922b25aaac`, and required schema migration `018_agentbus_account_workers`; removed active migration 019 and the central OSS/ECS update implementation from the main-line result.
-- Marked `EXT-001` as Reverted and reconciled the decision index, system overview, data flow, current state, task history, evidence index, and rollout commitment. Final rollback commit and remote `main` synchronization remain pending.
+- Marked `EXT-001` as Reverted and reconciled the decision index, system overview, data flow, current state, task history, evidence index, and rollout commitment.
+- Created rollback commit `81a0cdac8ea4be867ab43d0a84ffa547d159223d`. After a fresh fetch proved `origin/main` was still exactly `b2e33e2` and an ancestor of the rollback commit, a normal non-force push advanced remote `main` to `81a0cda`.
+- No production deployment, service restart, database migration, OSS publication, ECS command, Chrome reload, ERP access, live task mutation, history rewrite, or secret access occurred.
 
 ## Verification
 
@@ -47,6 +49,7 @@
 - Explicit version check returned source/release/artifact `0.5.165` and required migration `018_agentbus_account_workers`.
 - `git diff --exit-code f52d9d7 -- . ':(exclude).project-docs'`: passed, proving the active product tree exactly matches the pre-iteration baseline.
 - `check_project_docs.py`, `check_doc_drift.py --task-id 20260903-backup-revert-extension-update-c71a4e92`, and `git diff --check`: passed before commit.
+- Post-push fetch and `git ls-remote` returned remote `main` at `81a0cdac8ea4be867ab43d0a84ffa547d159223d` and the backup branch at `b2e33e2e5d29138891eabc93969cf24907492dfe`.
 
 ## Follow-ups