perf: 1440p re-measured with the kit - 363 fps, ~12% cost

Closes the 0.1.5 performance task. Same route and preset as 0.1.0 (packaged
Development, Epic scalability, TSR, VSync off, no frame generation, 2560x1440):

  0.1.0                2.42 ms (414 fps)  p99 3.01
  0.1.5 (kit)          2.76 ms (363 fps)  p99 3.64

The 625 kit actors and 8 generated textures cost about 12% of frame time and still
leave roughly six times the 60 fps floor. Frame-time series committed at
Docs/perf/0.1.5-kit-walk-frametimes.csv; comparison table added to
Docs/release-checks.md.

Records the measurement trap once more: runs showing ~105 fps were two overlapping
game instances, not the build - 363 fps reproduced twice on a clean single instance.

Docs/release-checks.md

@@ -127,6 +127,22 @@ Run on the packaged build (`GigLineQA`, Development, Vulkan SM5) with `-qaselfte
 
 Committed frame-time series: `Docs/perf/0.1.0-walk-frametimes.csv`.
 
+### `0.1.5` re-measure with the façade kit in the map
+
+Same route, same preset, packaged Development build, **2560×1440**:
+
+| Metric  |           `0.1.0` | `0.1.5` (kit + textures) |
+| ------- | ----------------: | -----------------------: |
+| Average | 2.42 ms (414 fps) |    **2.76 ms (363 fps)** |
+| p50     |           2.38 ms |                  2.73 ms |
+| p95     |           2.71 ms |                  3.17 ms |
+| p99     |           3.01 ms |                  3.64 ms |
+| Max     |           4.00 ms |                  4.62 ms |
+
+The **625 kit actors and 8 generated textures cost about 12 %** of frame time and still leave **363 fps average, p99 3.64 ms** — roughly six times the 60 fps floor. Frame-time series: `Docs/perf/0.1.5-kit-walk-frametimes.csv`.
+
+**Measurement trap, again:** runs that reported ~105 fps were two game instances overlapping (a previous launch had not exited). Confirm a single instance (`pgrep -af Binaries/Linux/GigLine`) before trusting a figure — 363 fps reproduced twice on a clean run.
+
 ## `0.1.0` — Fresh checkout build — record (2026-11-08)
 
 Followed the documented steps in [`Docs/build.md`](build.md) exactly, into a clean directory with no prior state: