Validate OpenGL texture binding slots

docs/modernization/roadmap.md

@@ -534,13 +534,14 @@ blend/depth/sampler state, texture formats, primitive modes, draw counts, and
 blit filters into GL-facing planned command data with explicit unsupported-token
 rejection before a runtime GL context is needed. It also plans whole recorded
 command streams, preserving per-command planned data while counting render
-passes, draws, shader binds, shader uniforms, texture uploads, mipmap
-generation, texture transitions, texture copies, texture readbacks, frame
-captures, passthrough commands, trace commands, unsupported commands, and
-render-pass ordering errors such as state changes outside a pass, nested
-passes, and unclosed passes. It also validates executable command dependencies,
-including shader-before-uniform and shader-plus-mesh before draw within each
-render pass.
+passes, draws, shader binds, shader uniforms, texture/sampler binds, texture
+uploads, mipmap generation, texture transitions, texture copies, texture
+readbacks, frame captures, passthrough commands, trace commands, unsupported
+commands, and render-pass ordering errors such as state changes outside a pass,
+nested passes, and unclosed passes. It also validates executable command
+dependencies, including shader-before-uniform and shader-plus-mesh before draw
+within each render pass, and rejects invalid texture/sampler bind slots in
+malformed recorded streams.
 The existing renderer classes are not yet fully
 behind the renderer interfaces.