Source kind is now declared per-file via a `dvd` / `bluray` / `webdl` /
`tvrip` token in the basename (case-insensitive, word-bounded). Matches
the existing `tt…` / `tvm…` filename convention. When no token is
present, falls back to the pixel-count guess in DetectMediaType, which
still only chooses between DVD and Blu-ray.
The parsed media type drives both ORIGINAL_MEDIA_TYPE in the muxed
metadata and the CRF/preset profile used for encoding. EncodingConfig
gains `webdl` and `tvrip` sub-blocks with conservative defaults
(WebDL 30/3, TVRip 32/2); user can override in config.yaml.
Manual updated with the new tokens, config fields, and pipeline
description.
Esa Kataja