Watchdogs/ folder + host conf rename

Move all watchdog scripts to a dedicated Watchdogs/ folder:
  Docker_Essentials/docker_watchdog.sh   → Watchdogs/
  unRAID_Essentials/system_watchdog.sh   → Watchdogs/
  unRAID_Essentials/resource_watchdog.sh → Watchdogs/
  Orchestrators/watchdog_orchestrator.sh → Watchdogs/
  Tools/watchdog_skip_list_manager.sh    → Watchdogs/

Rename host config files:
  master_host1.conf → host1.conf
  master_host2.conf → host2.conf

Update all references across the ecosystem:
  master.conf: WATCHDOG_ORCHESTRATOR_SCRIPTS paths → Watchdogs/
  load_config.sh: host*.conf glob + all comments
  git_pull_execute.sh: sparse checkout glob + all comments
  Partnership/ssh_setup.sh: HOST_CONF path construction
  user_script_plug-in.sh: all script paths + per-host conf path
  common.sh, README.md, README-User_Script_Plug-in.md: comment refs
  All Partnership, Fallback, Monitors, Transcodes, Tools scripts: comment refs

Media/Manual-Media.md

@@ -228,7 +228,7 @@ LIDARR_DISCOVERY_REJECT_COOLDOWN=30   # days before re-evaluating a Stage 2 reje
 LIDARR_DISCOVERY_HISTORY="$DATA_DIR/lidarr_discovery_history.db"
 ```
 
-Requires `HOST*_LASTFM_API_KEY` in `master_host*.conf`.
+Requires `HOST*_LASTFM_API_KEY` in `host*.conf`.
 
 ---
 
@@ -246,7 +246,7 @@ RADARR_DISCOVERY_SEED_LIBRARIES=("Movies")   # Emby libraries to draw seeds from
 RADARR_DISCOVERY_HISTORY="$DATA_DIR/radarr_discovery_history.db"
 ```
 
-Requires `HOST*_TMDB_API_KEY` in `master_host*.conf`.
+Requires `HOST*_TMDB_API_KEY` in `host*.conf`.
 
 ---
 
@@ -266,7 +266,7 @@ SONARR_DISCOVERY_HISTORY="$DATA_DIR/sonarr_discovery_history.db"
 # SONARR_EMBY_LIBRARIES is shared with emby_to_sonarr_sync — see Orchestrator Job Order
 ```
 
-Requires `HOST*_TMDB_API_KEY` in `master_host*.conf`.
+Requires `HOST*_TMDB_API_KEY` in `host*.conf`.
 
 > **MONITOR_MODE note:** Use `"all"` (default) to have Sonarr search all existing seasons
 > after adding a show. `"future"` only marks upcoming seasons as monitored — shows where
@@ -289,9 +289,9 @@ MEDIA_MAINTENANCE_JOBS=(
 
 ---
 
-## ━━━ CONFIGURATION — master_host*.conf ━━━
+## ━━━ CONFIGURATION — host*.conf ━━━
 
-### master_host1.conf
+### host1.conf
 
 ```bash
 # Shares this server applies permissions to
@@ -429,7 +429,7 @@ cp radarr_cleanup.sh readarr_cleanup.sh
 # 2. Replace RADARR_ prefix with READARR_ throughout
 #    Update API endpoint, tracked file API path, extension list, protected patterns
 
-# 3. Add to master_host*.conf
+# 3. Add to host*.conf
 HOST1_READARR_URL="http://192.168.50.2:8787"
 HOST1_READARR_API_KEY="your-api-key"
 HOST1_READARR_BOOKS_ROOT="/mnt/user/Books"
@@ -534,7 +534,7 @@ If ghosts persist:
   1. Is Emby's API responding?
      curl -s "http://[emby-ip]:8096/System/Info/Public"
 
-  2. Is EMBY_URL / EMBY_API_KEY correct in master_host*.conf?
+  2. Is EMBY_URL / EMBY_API_KEY correct in host*.conf?
      Run: sonarr_cleanup.sh --status  (shows Emby config)
 
   3. Trigger manually in Emby: