Render: bounded PNG/JPEG texture input admission (#909)

Bounded in-memory PNG/JPEG texture decoding with explicit base-colour/data-map roles; RGBA8 pixels are published only after a complete decode. Input only: no material assignment, GPU shading or persistence. Refs #900.

Contributed by @0xlillith.

Co-authored-by: lillith <35337584+0xlillith@users.noreply.github.com>

ROADMAP.md

@@ -89,6 +89,11 @@ PCB / Package, Render, Animation, Simulation, Manufacture/CAM, Drawings.
 
 ## Render foundation
 
+- Bounded PNG/JPEG texture admission (#900) validates in-memory sources and returns
+  completed RGBA8 pixels with explicit color/data roles. It is an input utility only:
+  ICC/16-bit normalization, local wood mapping, resource persistence and the renderer
+  consumer remain separate work. See [limits and licensed-file probes](docs/render-texture-input.md).
+
 - The initial opaque surface numerical contract for #1004 provides bounded linear
   color/metallic/roughness/IOR admission and an original tested direct-light BRDF.
   It does not enable PBR rendering or change stored appearances. See