TASK22224: harden createappealcompletemessage parity

memory-bank/change-log.md

@@ -516,3 +516,37 @@ Validation:
 Follow-ups:
 
 - Remaining optional cleanup in these handlers is dead import/unused local pruning (non-behavioral) if we want a final low-risk tidy pass.
+
+---
+
+### CL-013: TASK22224 completion-message route parity closure slice
+
+date: 2026-03-24
+author: Cline
+scope: `pages/api/file/createappealcompletemessage_api.js`, `tests/phase21/file-handler-contract.test.cjs`
+type: change
+rationale: Continue next requested slice by closing the final promise-chain parity outlier in file completion-message flow and strengthening phase21 contract coverage.
+impact: Improves maintainability and async error hygiene while preserving route behavior and existing error contracts.
+status: completed
+
+Summary:
+
+- `pages/api/file/createappealcompletemessage_api.js`
+    - replaced inline `.catch(...)` on fire-and-forget `updateAccount(...)` with explicit async IIFE + `try/catch` and `void` invocation
+    - preserved non-blocking behavior and logging semantics for account-update failure path
+    - preserved primary route contracts and success payload (`{ status: "success" }`)
+- phase21 file contract tests expanded:
+    - success path for encoded hash candidate on `createappealcompletemessage_api`
+    - dependency-failure contract assertion for `CREATE_APPEAL_COMPLETE_MESSAGE_FAILED`
+
+Validation:
+
+- `node tests/phase21/api-contract-slice1.test.cjs` -> pass
+    - helper: 4/4
+    - file-handler: 53/53
+    - email-handler: 12/12
+    - endpoint-handler: 152/152
+
+Follow-ups:
+
+- Optional final low-risk tidy sweep: remove dead imports/unused locals in legacy file handlers now that contract hardening stream is functionally complete.