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

unRAID_Essentials/Manual-Unraid_Essentials.md

@@ -190,7 +190,7 @@ RW_RECOVER_CYCLES=3         # consecutive under-threshold runs before de-escalat
 ### Per-Host Container Lists
 
 ```bash
-# master_host1.conf
+# host1.conf
 HOST1_RW_PAUSE_CONTAINERS=("Tdarr" "HandBrake")        # paused at medium pressure
 HOST1_RW_STOP_CONTAINERS=("LocalAI" "Satisfactory")    # stopped at hard pressure
 ```
@@ -654,7 +654,7 @@ RW_QBIT_DL_MEDIUM=10240
 
 RW_CRITICAL_CONTAINERS=("Emby" "NginxProxyManager" "Authelia" "Mariadb" "Redis")
 
-# ── Per-Host (master_host*.conf) ───────────────────────────────────────────────
+# ── Per-Host (host*.conf) ───────────────────────────────────────────────
 HOST1_RW_PAUSE_CONTAINERS=("Tdarr" "HandBrake")
 HOST1_RW_STOP_CONTAINERS=("LocalAI" "Satisfactory")
 HOST1_SABNZBD_URL="http://localhost:8080"