arr_sync.sh bidirectional union replaced the old split-ownership model.
Old: HOST1 owns Movies/TV/Music, HOST2 owns Anime — each arr manages
different shares to avoid conflicts.
New: arr_sync.sh keeps all arr databases in union. Either server can
download to any share at any time. The union is the source of truth.
Auth stack references left intact — HOST1 still owns auth config
(one-way sync to HOST2). Only media library ownership language updated.
Files changed:
README.md — server block + share annotations
Fallback/README-Fallback.md — role line + Split Source of Truth section
Orchestrators/README-Orchestrators — daily sync share comments
Rsync/Manual-Rsync.md — DEFAULT_RSYNC_OPTS comment block
Media/README-Media.md — HOST AWARENESS section