Backport official GLib iterator safety fix for Linux desktop

docs/ROADMAP.md

@@ -109,6 +109,10 @@ Status: implementation started; no production release yet. Windows VM tests use
 - [ ] Verify detailed performance UI interaction on native desktop platforms;
   repeat overhead measurements on representative libraries and hardware.
 - [ ] Formatting, lint, tests and security/dependency review.
+  - [x] Inventory locked Rust/npm advisories; prepare byte-verified compatible
+    upstream GLib iterator backport for the Linux desktop dependency graph.
+  - [ ] Execute optimized Linux backport regressions and native desktop checks;
+    complete native runtime and source security review. See DEPENDENCY-REVIEW.md.
 - [ ] CPU benchmarks: filename p95 <50 ms/1M records; text <150 ms/100K documents; semantic <500 ms on declared hardware.
 - [ ] Measure cold start, indexing throughput, RAM, disk and idle CPU.
 - [ ] Record the very first foreground query and distinct unseen queries after