Docs pass: update headers and READMEs for all new scripts

Script headers (6 files):
- Add OPERATIONAL SAFEGUARDS section to all discovery + emby sync scripts
- Add STATE FILES section to all 3 discovery scripts
- Add CONFIGURATION section to emby_to_*_sync.sh
- Rename USAGE → RUNTIME MODES in emby_to_*_sync.sh (doc standard)
- Fix SONARR_DISCOVERY_MONITOR_MODE default doc: "future" → "all"

Media/README-Media.md:
- Remove "WIP prototype" label; describe all 3 discovery scripts
- Add discovery scripts to scripts table and HOW THE SCRIPTS RELATE diagram
- Add weekly discovery schedule block to EXECUTION ORDER section
- Update intro to mention behavior-driven discovery

Media/Manual-Media.md:
- Add configuration reference sections for all 3 discovery scripts
- Add flag reference sections for all 3 discovery scripts

Tools/README-Tools.md:
- Add "Library Sync Bootstrap" category and emby_to_*_sync.sh to scripts table
- Add emby sync scripts to HOW THE SCRIPTS RELATE diagram

Tools/Manual-Tools.md:
- Update emby sync notes: search commands now fire immediately after add

README.md:
- Update Media folder description to include discovery
- Update weekly schedule to show discovery scripts
- Update README table entry for Media

README.md

@@ -482,7 +482,7 @@ Unraid_Scripts/
 ├── unRAID_Essentials/       ← Server-level: system watchdog, WebGUI, log hygiene, tuning
 │   README: README-Unraid_Essentials.md
 │
-├── Media/                   ← Library health: permissions, junk cleanup, orphan removal
+├── Media/                   ← Library health + behavior-driven discovery: permissions, junk cleanup, orphan removal, weekly arr adds
 │   README: README-Media.md
 │
 ├── Transcodes/              ← Ramdisk transcode management with SSD fallback
@@ -560,6 +560,7 @@ Every 6 hours:
 
 2:30am Sunday:
   weekly_sync_maintenance.sh  stop → update images → clean sync → start → weekly restarts
+                              + playback_aware_lidarr/radarr/sonarr_discovery.sh  (behavior-driven arr discovery)
 
 8am daily:
   weekly_health_digest.sh     DIGEST_PROFILE controls when it actually notifies
@@ -679,7 +680,7 @@ If you're setting this up from scratch on two servers:
 | [README-Docker_Essentials.md](Docker_Essentials/README-Docker_Essentials.md) | Two-tier container watchdog, memory limits, dependency ordering, skip list, daily/weekly restarts |
 | [README-Unraid_Essentials.md](unRAID_Essentials/README-Unraid_Essentials.md) | Three-tier system watchdog, WebGUI recovery, inotify tuning, PHP-FPM, log hygiene |
 | [README-Orchestrators.md](Orchestrators/README-Orchestrators.md) | What runs when, execution order, daily/weekly windows, adding jobs |
-| [README-Media.md](Media/README-Media.md) | Permissions model, junk cleanup, arr orphan removal, safety layers, testing procedure |
+| [README-Media.md](Media/README-Media.md) | Permissions model, junk cleanup, arr orphan removal, safety layers, behavior-driven discovery, testing procedure |
 | [README-Transcoding.md](Transcodes/README-Transcoding.md) | Ramdisk design, symlink architecture, Docker mount requirement, SSD fallback |
 | [README-Monitors.md](Monitors/README-Monitors.md) | Cert monitoring, SMART health, bandwidth tracking, health digest profiles |
 | [README-Partnership.md](Partnership/README-Partnership.md) | Auth stack sharing, onboard/offboard/transfer lifecycle, deferred offboard |