Document the local Godot 4.7.2 toolchain

Record the upgraded 4.7.2 binary, the retained 4.3 backup and the matching
export templates. Keep the project/CI baseline at 4.3 and note that 4.7.2
verified import, tests, the session smoke and a Linux export. Hide the
4.7-generated per-script UID sidecars from this clone only.

MEMORY.md

@@ -44,6 +44,13 @@ Session memory for durable decisions, state, and gotchas. Keep concise, remove o
 - Shift length is the scenario's `shift_duration_s` (900 s in all three venues). Tests and the screenshot tool override elapsed time; they do not change the default.
 - RNG: NPC reactions and event scheduling are seedable for deterministic tests.
 
+- **Local Godot toolchain (2026-11-01):** `~/.local/bin/godot` is 4.7.2 stable;
+  4.3 stable is kept as `~/.local/bin/godot-4.3.stable`. Export templates for
+  4.7.2 are installed under `~/.local/share/godot/export_templates/4.7.2.stable`
+  (4.3 remains). The project and CI still pin 4.3 in `project.godot`/the Gitea
+  workflow; 4.7.2 imports, runs the 231-test suite, session-shell smoke and a
+  Linux export successfully. Godot 4.7 writes `*.gd.uid` files; they are kept
+  out of this clone's status via `.git/info/exclude` until the project upgrades.
 - **Blender invocation (v0.6.0):** `flatpak run org.blender.Blender --background --python
   /run/media/system/DATA/Documents/06-games/security-game/tools/npc_pipeline.py -- build`.
   The flatpak cannot read `/tmp`; use absolute repo paths. `assets/models/npc/.gdignore` is