fix(release/parser): recognize Sxx-yy season range as tv_complete

`Der.Tatortreiniger.S01-06.GERMAN...` previously parsed as a movie
with 'S01-06' glued to the title. The parser now matches the
season-range form in _parse_season_episode (returning season=first,
episode=None), and the assemble step detects the range token to
promote media_type to 'tv_complete'.

The first season is exposed as `season` so `is_season_pack`
fires (season is not None and episode is None) — useful for routing
to a series root folder.

Fixture shitty/tatortreiniger_flat_multiseason/ updated:
- title: Der.Tatortreiniger.S01-06 → Der.Tatortreiniger
- season: null → 1
- media_type: movie → tv_complete
- is_season_pack: false → true

tests/fixtures/releases/shitty/tatortreiniger_flat_multiseason/expected.yaml

@@ -1,22 +1,22 @@
 release_name: "Der.Tatortreiniger.S01-06.GERMAN.1080p.WEB.x264-WAYNE"
 
-# Tech debt: range syntax 'S01-06' is not recognized as TV — falls through
-# to media_type=movie with the range glued onto the title. Captured here so a
-# future ranger-aware parser change is intentional.
+# Range syntax 'S01-06' is now recognized as a season-range marker:
+# season=1 (first of the range), media_type=tv_complete, and the token
+# no longer leaks into the title.
 parsed:
-  title: "Der.Tatortreiniger.S01-06"
+  title: "Der.Tatortreiniger"
   year: null
-  season: null
+  season: 1
   episode: null
   quality: "1080p"
   source: "WEB"
   codec: "x264"
   group: "WAYNE"
   tech_string: "1080p.WEB.x264"
-  media_type: "movie"
+  media_type: "tv_complete"
   languages: ["GERMAN"]
   parse_path: "direct"
-  is_season_pack: false
+  is_season_pack: true
 
 tree:
   - "Der.Tatortreiniger.S01-06.GERMAN.1080p.WEB.x264-WAYNE/"