Scanning is expensive and most servers auto-ingest new files, so a full crawl after
every download is usually wasted. Stage 1 now probes per library: take the newest
completed grab of that type from download history and ask the server (cheap targeted
search) whether it already has it. If yes, the server auto-picked it up (and the
earlier ones) → skip that library's crawl + poll entirely. Only libraries the server
is missing get rescanned. Always emits so stage 2 still reads the new items in.
- sources: PlexVideoSource.has_item / JellyfinVideoSource.has_item (match movie by
title+year, episode by show+SxE) + video_server_has_item() — conservative, any
uncertainty → False so we scan.
- handler: per-scope skip decision fed by latest_completed + server_has_item seams;
narrows the scan scope to only the missing libraries; toggle skip_if_present
(default on). Returns scanned/skipped for visibility.
Seam tests: skip-both, scan-only-missing, no-history, toggle-off, probe-error→scan;
Plex has_item match tests.
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