Move texture defaults behind renderer gl

docs/modernization/build-inventory.md

@@ -192,6 +192,10 @@ Known local toolchain state:
   `NodeStrokePreview` brush preview rendering also consumes backend-owned
   depth/scissor/blend state, viewport/clear-color queries, active texture
   units, 2D texture targets, copy targets, and sampler filters/wraps.
+  Legacy `Texture2D`, `TextureManager`, `Sampler`, and `RTT` public headers no
+  longer expose raw OpenGL enum defaults; default texture formats, sampler
+  filters/wraps, and render-target formats resolve through backend-owned
+  overloads.
 - `windows-msvc-vcpkg-headless` validates manifest install/configure/build/test
   for the current headless component matrix; see DEBT-0007 for remaining app
   and platform triplet migration.