Fix dead/incorrect vars and consolidate duplicated logic into common.sh

Codebase-wide audit pass: fixed real bugs (SSH hangs missing BatchMode,
local-outside-function no-ops, variable name collisions, a truncated
ratio calc, wrong state-dir path, DARK vs NO_INTERNET drift, and more),
then pulled logic that was duplicated across multiple scripts — arr
cleanup safety gates, docker restart ordering, container maintenance
stop/restart, watchdog state-file helpers, partnership role resolution,
cert expiry checks, remote node discovery, and TMDB discovery scoring —
into common.sh so each now has a single implementation.

Configurations/master.conf

@@ -802,6 +802,9 @@
 # Crash loop threshold
     WATCHDOG_CRASH_LIMIT=5          # RestartCount above this = critical crash loop
 
+# Required-container strikes — consecutive down-checks before docker_watchdog.sh attempts a restart
+    WATCHDOG_REQUIRED_STRIKE_LIMIT=2
+
 # Startup grace period — skip restarts while system is still booting
     WATCHDOG_STARTUP_GRACE=600      # seconds after boot before watchdog acts on failures
 
@@ -891,6 +894,9 @@
 # Seconds of warning broadcast to logged-in users before server_reboot.sh reboots.
 # Gives users time to save work — 300s = 5 minutes.
     REBOOT_SLEEP=300
+# Seconds to wait for graceful VM shutdown (ACPI signal via virsh) before libvirt
+# stops it anyway — reboot takes priority.
+    REBOOT_VM_WAIT=30
 
 # ━━━ Mover ━━━
 # Seconds to wait before mover_stop.sh sends SIGTERM to the mover process.
@@ -1085,6 +1091,7 @@
     LIDARR_MIN_TRACKED_PCT=80       # abort if tracked count drops below this % of last run
                                     # protects against API returning partial data on a bad day
     LIDARR_TRACKED_COUNT_FILE="$DATA_DIR/lidarr_tracked.count"
+    LIDARR_IMPORT_SCAN_TIMEOUT=600  # seconds to wait for pre-flight import scan
     LIDARR_EXTENSIONS=("flac" "mp3" "m4a" "wav" "aac" "ogg" "opus" "wma")
     LIDARR_PROTECTED_PATTERNS=(
         # Metadata
@@ -1153,6 +1160,7 @@
     SONARR_MIN_TRACKED_PCT=80       # abort if tracked count drops below this % of last run
                                     # protects against API returning partial data on a bad day
     SONARR_TRACKED_COUNT_FILE="$DATA_DIR/sonarr_tracked.count"
+    SONARR_IMPORT_SCAN_TIMEOUT=600  # seconds to wait for pre-flight import scan
     SONARR_EXTENSIONS=("mkv" "mp4" "avi" "m4v" "ts" "wmv" "mov")
     SONARR_PROTECTED_PATTERNS=(
         # Subtitles
@@ -1179,6 +1187,7 @@
     RADARR_MIN_TRACKED_PCT=80       # abort if tracked count drops below this % of last run
                                     # protects against API returning partial data on a bad day
     RADARR_TRACKED_COUNT_FILE="$DATA_DIR/radarr_tracked.count"
+    RADARR_IMPORT_SCAN_TIMEOUT=600  # seconds to wait for pre-flight import scan
     RADARR_EXTENSIONS=("mkv" "mp4" "avi" "m4v" "wmv" "mov")
     RADARR_PROTECTED_PATTERNS=(
         # Subtitles