Add renderer texture usage contract

docs/modernization/build-inventory.md

@@ -285,12 +285,12 @@ Known local toolchain state:
   source code reintroduces raw `GL_*`/`WGL_*` constants outside the allowed
   legacy OpenGL implementation files.
 - `pp_renderer_api` exposes a headless `RecordingRenderDevice` that validates
-  backend-owned resource creation, command order, render-pass color/depth/
-  stencil clear intent, scissor state, depth state, blend state, texture-slot
-  binding, sampler-state binding, texture-upload byte counts,
-  shader-uniform writes, explicit draw descriptor ranges, texture-copy regions,
-  readback bounds, frame-capture sources, destination buffer sizes, and
-  render-target blit regions, records
+  backend-owned resource creation, explicit texture usage flags, command order,
+  render-pass color/depth/stencil clear intent, scissor state, depth state,
+  blend state, texture-slot binding, sampler-state binding, texture-upload byte
+  counts, shader-uniform writes, explicit draw descriptor ranges,
+  texture-copy regions, readback bounds, frame-capture sources, destination
+  buffer sizes, and render-target blit regions, records
   render-pass-clear/scissor/depth/blend/shader-uniform/texture-bind/
   sampler-bind/draw/upload/texture-copy/readback/frame-capture/blit commands,
   draw mesh inputs, explicit draw ranges, and records trace markers without a