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Updates TRACK_COMPLETION_result_migration_small_files_20260617.md: 1. Test Results (after Phase 10): all 10 tiers PASS 2. Notes the pre-existing flakiness of test_execution_sim_live (unrelated to Phase 10 changes) 3. Scope Deviation section: G4 deviation RESOLVED in Phase 10 - 0 SILENT_SWALLOW in 37-file scope (was 27) - 0 UNCLEAR in 37-file scope (was 18) - 8 pre-existing BROAD_CATCH/OPTIONAL_RETURN (out of scope) 4. Phase 10 resolution summary: - Strategy A: 7 functions across 3 files migrated to full Result[T] - Strategy B: 21 sites across 9 files via narrow-catch + log - Dead code removal: 1 site - 5 new audit heuristics reclassified 14 UNCLEAR sites - Caller updates: gui_2, app_controller, external_editor - 8 test files updated to use result.ok / result.data