docs(licensing): remove ODbL attribution requirements and HUD credit references

Drop the OpenStreetMap/ODbL attribution requirement, the Google imagery rule,
and the related F-4 requirement, risk R-4, release check, and TODO items across
AGENTS, PLAN, ROADMAP, README, setup, architecture sections, and manifests.
OSM data is now documented as local private use only. Also normalize
numbered-list indentation in the architecture docs.

Docs/release-checks.md

@@ -30,8 +30,7 @@ Measured at 1440p on the development workstation: Bazzite, Ryzen 7 7700X, 64 GB
 4. 60 FPS at 1440p per the performance check above.
 5. Fresh checkout builds against the documented external engine installation.
 6. Linux build packaged and launched; controls documented in `Docs/` and shown in-game.
-7. Geographic attribution is visible in-game: "© OpenStreetMap contributors" with a working licence link.
-8. Tag `v0.1.0`, write the `CHANGELOG.md` entry, then remove the completed section from `TODO.md` (its goal stays in `ROADMAP.md`).
+7. Tag `v0.1.0`, write the `CHANGELOG.md` entry, then remove the completed section from `TODO.md` (its goal stays in `ROADMAP.md`).
 
 ## Check-record template
 
@@ -43,4 +42,3 @@ Measured at 1440p on the development workstation: Bazzite, Ryzen 7 7700X, 64 GB
 | `0.1.0` | 60 FPS at 1440p         | —      | —        | —    |
 | `0.1.0` | Fresh checkout build    | —      | —        | —    |
 | `0.1.0` | Packaged Linux build    | —      | —        | —    |
-| `0.1.0` | Attribution display     | —      | —        | —    |