Docs: G15 and the parity doc cite budget runs and slowness reports since 2026-10-11

The "Performance unverified" bullet in docs/target-app-parity.md said
that the budgets had not been run on an idle machine since 2026-10-01,
that the last loaded run missed the 16 ms frame budget at 50k paths,
and that no user had reported slowness in mainstream work beyond #575
and #758. On 2026-10-11 #1155 recorded idle-machine runs, made before
#1173 merged, and runs of #1173's change met every budget at 50k paths
(load average 4 to 7) and at 25k paths. #1097 (zoom and pan in 0.9.0)
and #1731 (a drag that stutters as it starts) are open. G15 in
docs/gaps.md called the 25k-path run the last one, but on 2026-10-13 a
comment on #1172 reported runs of 0.10.0 on Linux with 4 logical CPUs
that missed all three render budgets at 20k paths.

The bullet now gives the 25k-path run and the runs in #1172, and lists
#1097 and #1731 with #575 and #758 as open user reports of slowness.
G15 no longer calls the 25k-path run the last one and adds the runs in
#1172.

docs/gaps.md

@@ -218,8 +218,9 @@ from G14 and the budget run of G15: **~170–270 h** one agent, ~50–80 h wall
 ## G15 Performance budgets and a GPU renderer
 
 - **Improved (#1257):** Craquelure, Mosaic Tiles and Stained Glass reuse squared distances during nearest-cell searches, with the original distance ordering retained near rounding/tie boundaries. A brute-force boundary regression and full-viewport pixel comparisons agree with the old result. `texture_drag_perf` reproduces a moved CMYK rounded rectangle at 190.07% and DPI 1.5; timings from a busy development machine are supporting evidence, with idle Windows drag QA still pending.
-- **Missing:** an idle-machine run of `vectorcraft-cli perf` at 50k paths (last: 2026-10-11 at 25k paths, every
-  budget met, 400% zoom 12.3 ms against 16 ms, measured), a spatial index for zoomed-in frames, dirty-region
+- **Missing:** an idle-machine run of `vectorcraft-cli perf` at 50k paths (2026-10-11 at 25k paths, every budget
+  met, 400% zoom 12.3 ms against 16 ms, measured; runs of 0.10.0 on Linux with 4 logical CPUs, reported in #1172
+  on 2026-10-13, missed all three render budgets at 20k paths), a spatial index for zoomed-in frames, dirty-region
   rendering, the GPU backend spike (M5). Large-selection edits, cached live effects and Pathfinder Trim, Merge,
   Crop and Outline landed in #1173.
 - **Not redrawn:** the canvas keeps drawing these objects as they were: