Keep generated realism runs out of the repository

Ignore docs/screens/realism/ entirely and remove its reports/captures from the
index while leaving the generated folders on disk. Update the asset-tooling and
concept notes to treat realism runs as local QA artifacts. Link scan clean.

.gitignore

@@ -66,10 +66,10 @@ assets/models/blender/**/*.png
 assets/models/blender_src/*.blend1
 # Editable Blender sources are developer-only; keep the .gdignore marker tracked.
 assets/models/blender_src/*.blend
-# Realism pass (tools/scene_concepts.py): the candidate pool and per-run captures
-# stay local; the validated picks are tracked under game_ready/v2/picks/ (ADR-0014),
-# and each run commits its report.{json,md} + sheet.jpg. Concept references are
-# committed in docs/screens/concepts/.
+# Realism pass (tools/scene_concepts.py): candidate pools, per-run captures and
+# generated reports stay local; validated picks are tracked under
+# game_ready/v2/picks/ (ADR-0014). Concept references are committed in
+# docs/screens/concepts/, but generated QA lives outside the repository.
 assets/textures/ai/game_ready/v2/*
 !assets/textures/ai/game_ready/v2/picks/
-docs/screens/realism/**/*.png
+docs/screens/realism/