Share retained runtime GL dispatch

docs/modernization/build-inventory.md

@@ -592,6 +592,9 @@ powershell -ExecutionPolicy Bypass -File scripts\automation\apple-remote-build.p
   Retained RTT clear and masked-clear endpoints also share it for color-mask
   query/apply, clear-color, and buffer-clear callbacks instead of owning a
   local raw clear callback cluster.
+  App startup logging, Windows early context logging/window-title detection,
+  and shader capability detection now share `legacy_gl_runtime_dispatch` for
+  runtime string and extension enumeration callbacks.
   Retained desktop HMD eye rendering also routes viewport
   execution through tested backend dispatch.
   Legacy `Texture2D`, `TextureManager`, `Sampler`, and `RTT` public headers no