Use order-insensitive token comparison in calculate_filename_confidence
so variant names with reordered tokens (e.g., int8_convrot vs convrot_int8)
score higher. Replace first-match partial matching in HuggingFace source with
best-match selection based on filename confidence, and surface confidence in
search results.
Enable matching files in the HuggingFace author index by SHA-256 in
addition to filename. Enrich the author index with hashes from repo
tree responses, store them in the index metadata, and use them as a
primary lookup path during search_huggingface_for_file before falling
back to filename-based search. Also update the author index cache
version to 2 and add tests for the new behavior.
Support both Comfy-Org and Kijai author indexes as known HuggingFace fallbacks, aggregate their status in the backend, refresh the cached author index, and update the frontend UI and tests.