Sync READMEs and manuals to current script headers

Fix discrepancies found by auditing docs against headers:
- stability_watchdog.sh: wrong variable name (STRIKES → STRIKE_LIMIT) and wrong default (2hr → 12hr) in header
- Watchdogs manual: REBOOT_WINDOW_HRS example value was 2, should be 12
- Transcodes README: transcode_cleanup/manager table said "Every 3 min", should be "Every 7 minutes"
- Tools manual: fallback_state_reset.sh still marked "not yet built" — rewrite section to reflect current script
- Tools manual: claude_startup --setup flag doesn't exist; modes were inverted — fix and add --launch
- Tools README + manual: add docker_prune_images.sh (existed but undocumented)
- Tools manual: add play_state_sync.sh --full to flag reference
- Orchestrators README: arrs_failed_stalled_recovery runs via intermediate_sync (every 4hr), not standalone every 6hr
- Plugin README: add build.sh to scripts table
- Partnership README + manual: add partnership_transfer.sh and onboard_cancel.sh to script tables and flag reference

Media/Manual-Media.md

@@ -632,6 +632,27 @@ No recovery possible after deletion.
 
 ---
 
+### play_state_sync.sh
+
+`play_state_sync.sh`  
+Sync played/unplayed state and resume positions from local Emby to the remote Emby.
+Only items played within PLAY_SYNC_DAYS are synced.
+
+`play_state_sync.sh --full`  
+Ignore PLAY_SYNC_DAYS — sync all played items regardless of age. May be slow on large
+libraries. Use after a new Emby install or database restore to rebuild full play history.
+
+`play_state_sync.sh --dry-run`  
+Show what would be synced without writing any state.
+
+`play_state_sync.sh --status`  
+Show configured servers, reachability, and user counts.
+
+`play_state_sync.sh --log`  
+Verbose output — show each item comparison.
+
+---
+
 ### arrs_failed_stalled_recovery.sh
 
 `arrs_failed_stalled_recovery.sh`