Reuse completed Google embeddings and resume semantic staging

docs/ROADMAP.md

@@ -100,7 +100,7 @@ Status: implementation started; no production release yet. Windows VM tests use
   Warm p95 alone does not satisfy the first-use requirement.
 - [ ] Test migrations, interrupted work, invalid documents, inaccessible/offline roots and cloud placeholders.
 - [ ] Automated native build matrix and documented supported cross-compilation paths.
-- [x] Native Linux headless workspace tests: 93 passed, 11 explicitly ignored.
+- [x] Native Linux headless workspace tests: 98 passed, 15 explicitly ignored.
 - [x] Native Linux Google text/code/media reference parity and service
   lifecycle/rebuild recovery: seven genuine CPU integration tests passed.
 - [x] Unsigned Linux x86-64 headless archive: verify extracted checksums/modes,
@@ -143,7 +143,13 @@ Audit and measured priorities: [EMBEDDINGGEMMA2-AUDIT.md](EMBEDDINGGEMMA2-AUDIT.
 - [x] Windows x64 baseline/optimized CPU runtime selection and OS AVX-state
   checks, verified with real packaged baseline and optimized inference.
 - [ ] Validate CPU selection on older hardware and remaining architectures.
-- [ ] Incrementally reuse unchanged document/media vectors in atomic generations.
+- [x] Completed-source vector reuse in atomic schema-7 generations, verified
+  with genuine Google CPU document/code/image/audio/video fixtures.
+- [x] Resume completed staging sources after failed publication; incomplete
+  groups are purged under the OS build lock before retry.
+- [ ] Process-kill/concurrent-source integration, pre-inference pruning near
+  chunk limits, component-policy reuse and indexing/foreground measurements.
+  See [INCREMENTAL-SEMANTIC.md](INCREMENTAL-SEMANTIC.md).
 - [ ] Benchmark genuine token-budgeted multi-sequence batching and isolation.
 - [ ] Implement and measure shared foreground/indexer resource budgets/priority.
 - [ ] Attribute startup cost; measure smaller query context and selective encoders.