fix(video): TMDB match cache never invalidated on movie<->show reclassification

The real reason a node restart alone didn't fix already-indexed entries
after the previous commit's enrichment change: _do_media_meta_request
checked media_cache's file->tmdb mapping (keyed by content hash) and
trusted it unconditionally, before ever comparing it against the file's
*current* movie/show classification. A file whose season/episode changed
on a later scan — exactly what the Specials-folder fix does, for every
file it reclassifies from "movie" to "tv" — kept answering with its
stale, wrong-kind-of-match forever, since nothing about a reclassification
touches this cache or its key.

Now falls through to a fresh search whenever the cached media_type
disagrees with what the entry resolves to right now, rather than trusting
a mapping that predates the file's current classification.

1 files changed, 14 insertions, 2 deletions

diff --git a/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py b/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py
index 724527b..2b3e3ee 100644
--- a/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py
+++ b/packages/meshbay-node/src/meshbay_node/transport/webrtc_server.py
@@ -2914,8 +2914,20 @@ class WebRTCPeerSession:
         meta = None
         tmdb_id = None
         if cached is not None:
-            tmdb_id, media_type = cached
-            meta = await media_cache.get_tmdb_meta(tmdb_id, media_type)
+            cached_tmdb_id, cached_media_type = cached
+            # Trustworthy only if it still agrees with what this file
+            # resolves to *now*. season/episode come from index-time
+            # enrichment (enrich.py), which can reclassify a file between
+            # movie and show on a later scan without this cache knowing —
+            # it is keyed by the file's content hash alone, which a
+            # reclassification never changes. Found live: an enrichment fix
+            # to a Specials-folder bug reclassified hundreds of files from
+            # "movie" to "tv", and every one kept answering with its
+            # stale movie-era match forever, because this was trusted
+            # before ever comparing media_type against the current one.
+            if cached_media_type == media_type:
+                tmdb_id = cached_tmdb_id
+                meta = await media_cache.get_tmdb_meta(tmdb_id, media_type)
 
         if meta is None:
             result, ratio = await self._tmdb_search(tmdb_client, entry, is_show)