Preserve mixed evaluation evidence with reserved atomic report checkpoints

docs/ROADMAP.md

@@ -344,6 +344,8 @@ build was inferred from that lookup; macOS execution gates remain unchecked.
 - [x] Correct valid pre-1970 filesystem timestamps across indexing, source eligibility and previews. Changed crates passed 100 tests (six ignored), desktop 47; strict Clippy and formatting passed. See [audit](RUST-AUDIT.md).
 - [x] Publish Windows v0.1.4 with the timestamp correction; verify public bytes, packaged helper provenance and isolated real Google CPU query-worker startup. See [evidence](WINDOWS-0.1.4.md).
 - [x] Publish updated Linux headless and Debian packages with the timestamp correction; genuine archived-document CPU search, unchanged rescan and packaged query-worker startup passed. Public bytes verified; [evidence](LINUX-0.1.4.md).
+- [x] Protect mixed quality evidence from accidental report overwrite and partial JSON publication; eight evaluator contract tests passed.
+- [ ] Finish the unchanged frozen mixed regression on the current 0.1.4 engine, then compare routing effects without changing labels or tuning against results. Active CPU-only report: `.searchi/qa/mixed-v1-current-014.json`; completion must be verified before reporting scores.
 
 Initial Windows delivery is complete. Native interaction/upgrade, actual GPU,
 macOS execution and independent media-quality work remain real follow-up; the