Prepare text search during media setup and retain query sessions through promotion

docs/ROADMAP.md

@@ -193,8 +193,12 @@ Audit and measured priorities: [EMBEDDINGGEMMA2-AUDIT.md](EMBEDDINGGEMMA2-AUDIT.
     downloading; preserve verified assets and honest media setup status.
     - [x] Typed backbone/projector verification callbacks with full-pair setup
       semantics preserved; 16 asset tests passed, including gated media download.
-    - [ ] Integrate explicit text/media coverage, retained query readiness and
-      media retry status across engine/desktop; verify actual first use.
+    - [x] Integrate explicit text/media coverage, retained query readiness and
+      media retry status across engine/desktop; genuine CPU promotion reuses
+      identical document vectors with zero document re-encodes.
+      See [early text setup](EARLY-TEXT-SETUP.md).
+    - [ ] Verify native first use during genuine delayed media download,
+      failure/retry and promotion; record actual first-input timing separately.
 - [ ] Buffered bounded media IPC and linear UTF-8 source-window offset processing.
 - [ ] Evaluate 256d MRL and content-specific vision budgets on independent data.
 - [ ] Validate GPU precision, synchronization-aware timings, parity and fallback