v1.9.11

Fixes

• Read-ahead buffer pool: recycle by capacity instead of exact length, so chunks from torrents with non-power-of-two piece lengths (~25% of the library) stay poolable instead of draining the pool
• Sync engines (movie/TV) now invalidate FUSE-layer state (dircache, registry, active pump/handles) when removing a stub file out-of-band, instead of a bare os.Remove that bypassed the Unlink handler — this previously let Plex register a replaced file as a ghost duplicate media version during the stale-cache window
• Sync engines now log Plex library refresh failures instead of silently swallowing them