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.

README.md

@@ -52,7 +52,7 @@ precision walk, the Joke Shop alley, the TV Studio arrival, and the prop lineup.
 If you are here to develop or test locally instead of downloading, jump to
 [Setup and Run](#setup-and-run) below.
 
-The project is under active development. The design and architecture are documented, and a playable prototype vertical slice exists (Godot 4.3 + GDScript): a procedural Hollywood Boulevard entrance, a first-person guard, simulated NPCs with intents and reactions, the six-level escalation model, access inspection and admission decisions, radio calls with credibility checks, reputation, crowd mood, and an end-of-shift review.
+The project is under active development. The design and architecture are documented, and a playable prototype vertical slice exists (Godot 4 + GDScript): a procedural Hollywood Boulevard entrance, a first-person guard, simulated NPCs with intents and reactions, the six-level escalation model, access inspection and admission decisions, radio calls with credibility checks, reputation, crowd mood, and an end-of-shift review.
 
 ## Game Overview