review-fix(comments): restore lost #NNNN rationale comments across non-test source (mechanical sweep, condensed, code unchanged)

For each issue anchor present in BASE 63279301bc non-test .py and absent on HEAD, the BASE comment/docstring block was re-attached at the HEAD location of the code it explained (matched by the distinctive code line / enclosing def). Sentences already covered by an existing HEAD comment were deduped; the issue number always survives. Insert-only: no code lines changed.

tools/video_generation_tool.py

@@ -68,6 +68,8 @@ VIDEO_GENERATE_SCHEMA: Dict[str, Any] = {
             },
             # Capability-gated args are added by _build_dynamic_video_schema; never statically.
         },
+        # NOTE (schema diet, #95681): image_url / reference_image_urls / negative_prompt / audio / seed /
+        # upscale are added per-capability by _build_dynamic_video_schema.
         "required": ["prompt"],
     },
 }