TASK22102: slice6 blob crud and retrieval contract cleanup

memory-bank/change-log.md

@@ -1472,3 +1472,39 @@ Validation:
 Follow-ups:
 
 - Continue next larger slice on remaining file handlers with empty 400 responses to complete contract-consistency rollout.
+
+---
+
+### CL-040: TASK22102 API contract consistency — Slice 6 (CRUD/blob retrieval group)
+
+date: 2026-03-17
+author: Cline
+scope: `pages/api/file/{deleteblob,deleteblobcase,deleteblobrep,deleteawaitingsubmissionfromblob,getprogressobjblob,getawaitingsubmissionfromblob,getrepsblob}.js`
+type: change
+rationale: Deliver the first of two remaining larger slices by standardizing response contracts across blob CRUD and retrieval handlers still using direct/empty response patterns.
+impact: Improves consistency and safety of error responses in selected blob handlers while preserving existing success payload behavior and cache-control semantics.
+status: completed
+
+Summary:
+
+- Migrated 7 blob CRUD/retrieval handlers to `respondSuccess`/`respondError`:
+    - `deleteblob`
+    - `deleteblobcase`
+    - `deleteblobrep`
+    - `deleteawaitingsubmissionfromblob`
+    - `getprogressobjblob`
+    - `getawaitingsubmissionfromblob`
+    - `getrepsblob`
+- Replaced empty `400` and direct status responses with structured error envelopes including explicit codes/messages.
+- Removed redundant post-hash equality branches where equivalent logic was already guaranteed after early guard checks.
+- Preserved response behavior:
+    - existing success data payload shapes retained (`{ data: ... }` or direct data payloads)
+    - `getrepsblob` retains `Cache-Control: no-store` header.
+
+Validation:
+
+- `npx next lint --file pages/api/file/deleteblob.js --file pages/api/file/deleteblobcase.js --file pages/api/file/deleteblobrep.js --file pages/api/file/deleteawaitingsubmissionfromblob.js --file pages/api/file/getprogressobjblob.js --file pages/api/file/getawaitingsubmissionfromblob.js --file pages/api/file/getrepsblob.js` -> pass (no warnings/errors)
+
+Follow-ups:
+
+- Execute final Slice 7 for remaining complex handlers (`upload`, `getbloblist`, `downloadblob`, `generateappealpdf`) to complete the 2-slice finish plan.