Add weekly download orphan cleaner — nothing covered the SAB Completed folders and 755G of orphans accumulated since 2022

Deployment/host.conf.template

@@ -439,6 +439,8 @@
     HOSTN_SONARR_GENERAL_ROOT=""  # rootFolderPath literal for the general root (e.g. "/tv") — target for reverse-kids-leak moves; leave blank to disable
     HOSTN_SONARR_KIDS_ROOT=""    # rootFolderPath literal, as reported by Sonarr API — leave blank if no dedicated kids root
     HOSTN_SONARR_ANIME_ROOT=""   # rootFolderPath literal, as reported by Sonarr API — leave blank if no dedicated anime root
+    HOSTN_SONARR_DOWNLOAD_DIR=""            # host path of the completed-downloads folder Sonarr imports from (e.g. "/mnt/cache/Temp_Storage/SABnzbd/Completed/Tv Shows") — blank disables the download orphan cleaner for Sonarr
+    HOSTN_SONARR_DOWNLOAD_CONTAINER_DIR=""  # same folder as Sonarr's container sees it (e.g. "/downloads/Completed/Tv Shows") — needed to trigger import scans on held folders
 
     declare -A HOSTN_SONARR_PATH_MAP=(
         # ["/tv"]="/mnt/user/Tv_Shows"
@@ -452,6 +454,8 @@
     HOSTN_RADARR_GENERAL_ROOT=""  # rootFolderPath literal for the general root (e.g. "/movies") — target for reverse-kids-leak moves; leave blank to disable
     HOSTN_RADARR_KIDS_ROOT=""    # rootFolderPath literal, as reported by Radarr API — leave blank if no dedicated kids root
     HOSTN_RADARR_ANIME_ROOT=""   # rootFolderPath literal, as reported by Radarr API — leave blank if no dedicated anime root
+    HOSTN_RADARR_DOWNLOAD_DIR=""            # host path of the completed-downloads folder Radarr imports from (e.g. "/mnt/cache/Temp_Storage/SABnzbd/Completed/Movies") — blank disables the download orphan cleaner for Radarr
+    HOSTN_RADARR_DOWNLOAD_CONTAINER_DIR=""  # same folder as Radarr's container sees it (e.g. "/downloads/Completed/Movies") — needed to trigger import scans on held folders
 
     declare -A HOSTN_RADARR_PATH_MAP=(
         # ["/movies"]="/mnt/user/Movies"

Deployment/master.conf.template

@@ -439,6 +439,7 @@
         "unRAID_Essentials/clear_logs.sh"               # purge aged logs — Sunday only, low priority
         "Arrs_Stack/arr_full_rescan.sh"                 # full disk↔DB reconciliation for Lidarr/Sonarr/Radarr — keeps tracked stats honest, runs before discovery so it works off fresh data
         "Arrs_Stack/arr_corruption_scan.sh --remediate"      # ffprobe-based corruption sweep of Sonarr's tracked files — deletes+re-searches only after CORRUPTION_SCAN_STRIKE_LIMIT consecutive hits on the same file
+        "Arrs_Stack/arr_download_orphan_cleaner.sh"          # sweep orphaned completed downloads out of the SAB Completed folders — deletes junk + already-imported leftovers, triggers import scans for genuinely-missing content
         "Arrs_Stack/playback_aware_lidarr_discovery.sh"      # behavior-driven music discovery using weekly Emby playback history
         "Arrs_Stack/playback_aware_radarr_discovery.sh"      # behavior-driven movie discovery using TMDB recommendations
         "Arrs_Stack/playback_aware_sonarr_discovery.sh"      # behavior-driven TV discovery using TMDB recommendations
@@ -1257,6 +1258,19 @@
     RADARR_DROPPED_ADD_EXCLUSION=true   # add removed movies to import exclusion list
     SONARR_DROPPED_ADD_EXCLUSION=true   # add removed series to import exclusion list
 
+# ━━━ Download Orphan Cleaner (arr_download_orphan_cleaner.sh) ━━━
+# Weekly sweep of the SABnzbd Completed folders Sonarr/Radarr import from — deletes junk and
+# parse-verified already-in-library leftovers the arr queue no longer references, triggers
+# import scans for anything the library is actually missing. Built 2026-07-26 after 755G of
+# orphaned completed downloads (accumulating since 2022) filled HOST1's cache pool to 89%.
+# Per-host dirs: HOST*_SONARR_DOWNLOAD_DIR / HOST*_RADARR_DOWNLOAD_DIR (+ _CONTAINER_DIR).
+    DOWNLOAD_ORPHAN_CLEANER_ENABLED=true
+    DOWNLOAD_ORPHAN_AGE=7               # days — entries younger than this may be mid-import, never touched
+    DOWNLOAD_ORPHAN_MIN_VIDEO_MB=50     # no video file above this = junk (par2 debris, samples, dead archives)
+    DOWNLOAD_ORPHAN_MAX_DELETE_GB=100   # abort delete pass over this — a partial queue fetch would classify
+                                        # live downloads as orphans, and a huge total is that failure's symptom;
+                                        # --i-know-what-im-doing overrides for known backlogs
+
 # ━━━ Arr Content Classification (radarr/sonarr_classification_scan.sh) ━━━
 #
 # Curated lists validated against real library data 2026-07-17 — every entry here was