Point the classify weights at wiltodelta/raiw-photo-classify

The Hub model and the private training repository were both called
raiw-models, so the training repo's README had to spend a paragraph telling
the two apart. Renamed on both sides: the Hub model to raiw-photo-classify
and the GitHub repository to raiw-classifier-training.

Done now because it is free now. classify.py landed after v0.36.0 and is in
no release, and the Hub model had zero all-time downloads, so no installed
package and no user carries the old id. Hugging Face redirects the old URL
and preserves counts, and the pinned freeze revision c0ac82b6 resolves on
the new name -- verified by downloading through the library's own constants.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

.github/workflows/publish-photo-classify-hf.yml

@@ -3,7 +3,7 @@ name: Publish photo classifier to Hugging Face
 # Manual only. Not part of a library release. The Space demo
 # (wiltodelta/remove-ai-watermarks) stays on distribute.yml / raiw-hf-space.
 #
-# Hub model: wiltodelta/raiw-models
+# Hub model: wiltodelta/raiw-photo-classify
 # Secret: HF_TOKEN, write-role Hugging Face token (same secret Space sync uses).
 #
 # Weights are not in git. Full mode downloads them from a GitHub Release