Add renderer resource factory contract

docs/modernization/build-inventory.md

@@ -285,16 +285,18 @@ 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
-  command order, scissor state, depth state, blend state, texture-slot binding,
-  sampler-state binding, texture-upload byte counts, readback bounds,
-  frame-capture sources, destination buffer sizes, and render-target blit
-  regions, records render/scissor/depth/blend/texture-bind/sampler-bind/upload/
-  readback/frame-capture/blit commands, draw mesh inputs, and records trace
-  markers without a window or GL context.
+  backend-owned resource creation, command order, scissor state, depth state,
+  blend state, texture-slot binding, sampler-state binding, texture-upload byte
+  counts, readback bounds, frame-capture sources, destination buffer sizes, and
+  render-target blit regions, records
+  render/scissor/depth/blend/texture-bind/sampler-bind/upload/readback/
+  frame-capture/blit commands, draw mesh inputs, and records trace markers
+  without a window or GL context.
 - `pano_cli record-render` exposes the recording renderer through JSON
   automation, including scissor/depth/blend/texture-bind/sampler-bind/upload/
-  readback/frame-capture/blit command and byte totals plus draw vertex/index
-  totals, and is covered by `pano_cli_record_render_smoke` plus
+  readback/frame-capture/blit command and byte totals, backend resource
+  creation counts, plus draw vertex/index totals, and is covered by
+  `pano_cli_record_render_smoke` plus
   `pano_cli_record_render_rejects_oversized_target`.
 - `pano_cli simulate-document-history` exposes `pp_document::DocumentHistory`
   apply/undo/redo state through JSON automation and is covered by