Table cells: read own overrides from either layout

Co-Authored-By: Claude Opus 5.5 <[email protected]>

Cargo.lock

@@ -4206,7 +4206,7 @@ dependencies = [
 [[package]]
 name = "opencadcodec"
 version = "0.5.5"
-source = "git+https://github.com/ramox81/cadcodec.git?rev=435c736#435c736b79c3c62133ea34bd221263e58313b09f"
+source = "git+https://github.com/ramox81/cadcodec.git?rev=22b3d1a#22b3d1a1afe9c799185eb6acac41b80db35a7989"
 dependencies = [
  "ahash 0.8.12",
  "anyhow",