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/media_cleaner.sh

@@ -5,10 +5,10 @@
 #
 # PURPOSE
 # ─────────────────────────────────────────────────────────────────────────────
-# Remove junk files from media shares using configurable file patterns. Two
-# profiles — anime and media — each with their own folder list and patterns.
-# Runs second in the daily maintenance window, after permissions and before
-# arr cleanup, so orphan detection only encounters actual media files.
+# Remove scene debris, tool artifacts, and unsafe files from media shares
+# before the orphan scan — so arr cleanup only encounters actual media files.
+# Runs second in the daily window, after permissions and before arr cleanup.
+# Two profiles — anime and media — each with their own folder list and patterns.
 #
 # ==============================================================================================
 # OPERATIONAL MODEL
@@ -18,15 +18,29 @@
 #   anime — cleans ANIME_CLEAN_FOLDERS using ANIME_FILE_PATTERNS
 #   media — cleans MEDIA_CLEAN_FOLDERS using MEDIA_FILE_PATTERNS (adds *.iso *.lrc)
 #
-# Removes junk left by download clients, scene releases, and tools:
-#   *.sfv *.md5 *.sha1   — checksum files — useless post-download
-#   *.nfo *.url *.lnk    — scene info files — not needed in media library
-#   *.rar *.zip          — archives — source files not needed after extraction
-#   *.sample* *.proof*   — scene samples — never needed
-#   *sync-conflict*      — Syncthing conflict files
-#   *.scr *.exe          — executables — should never be in a media folder
-#   *.torrent            — torrent files left by download clients
-#   *.log *.json         — tool output files
+# Scene debris — left by scene releases and download clients:
+#   *.sfv *.md5 *.sha1        — checksums — useless post-download
+#   *.nzb *.torrent           — download files left by clients
+#   *.url *.lnk *.info *.diz  — scene metadata
+#   *.sample* *.proof*        — scene samples — never needed in library
+#   *sync-conflict*           — Syncthing conflict copies
+#   *.rar *.zip *.7z *.ace    — archives — source not needed after extraction
+#   *.r00-*.r09 *.srr         — multi-part rar segments and repair files
+#   *.001 *.002 *.003         — split archive parts
+#   *.gz *.tar *.bz2          — linux archives
+#
+# Tool artifacts — incomplete or stale files from download clients:
+#   *.!ut *.!qB               — uTorrent / qBittorrent incomplete markers
+#   *.crdownload *.opdownload — Chrome / Opera incomplete downloads
+#   *.part                    — partial download files
+#
+# Unsafe files — executables that should never appear in a media folder:
+#   *.exe *.scr *.com         — Windows executables
+#   *.bat *.cmd *.vbs *.ps1   — Windows scripts
+#   *.msi *.dll *.sys         — Windows system files
+#   *.sh                      — shell scripts in media folders = suspicious
+#
+# Media profile also removes: *.iso *.lrc
 #
 # ==============================================================================================
 # OPERATIONAL SAFEGUARDS
@@ -37,13 +51,12 @@
 #   Empty array guards   — warns and exits cleanly if no folders or patterns configured
 #   Folder existence     — skips missing folders with warning, continues others
 #   validate_unraid_cmd  — notify script validated before use
-#   Silent by default    — only problems and removals produce output
 #
 # ==============================================================================================
 # CONFIGURATION
 # ==============================================================================================
 #
-# master_host*.conf
+# host*.conf
 #
 #   HOST*_ANIME_CLEAN_FOLDERS — folders cleaned by the anime profile on this host
 #   HOST*_MEDIA_CLEAN_FOLDERS — folders cleaned by the media profile on this host
@@ -128,7 +141,7 @@ esac
 # Empty array guards
 if [[ ${#CLEAN_FOLDERS[@]} -eq 0 ]]; then
     warn "No folders configured for profile '$PROFILE' on $MY_ID"
-    warn "Check HOST*_${PROFILE^^}_CLEAN_FOLDERS in master_host*.conf"
+    warn "Check HOST*_${PROFILE^^}_CLEAN_FOLDERS in host*.conf"
     exit 0
 fi