- Add cache_rules input: JSON array of per-file cache overrides, each uploaded individually with its own Cache-Control and Content-Type headers and excluded from the bulk sync
- When versioning is true and cache_rules is empty, auto short-cache index.html (no-cache, max-age=300) if it exists in dist_dir
- Fix EXCLUDE_ARGS and CT_ARG to use bash arrays for correct handling of filenames and content-type values containing spaces
