feat: arr-native distributed media sync + config architecture fixes

Arr sync (new):
- Media/arr_sync.sh — full mesh bidirectional sync across all HOST* nodes
  - Lidarr (MusicBrainz), Sonarr (TVDB), Radarr (TMDB) all handled in one script
  - Remote API keys read live from config.xml via SSH — never stored in conf files
  - Shared blocklist (DATA_DIR/arr_sync_blocklist.tsv) merged from all nodes at runtime
  - Graceful skip if arr not configured locally or not reachable on a remote node
  - --blocklist-add / --blocklist-remove / --blocklist-list management flags
- daily_sync_maintenance.sh — arr sync runs as explicit phase before rsync
- partnership_onboard.sh — Step 3 bootstraps merged library on both sides at onboard
- master.conf — ARR_SYNC_* config block, DOCKER_APPDATA_BASE

Rsync / cleanup:
- DEFAULT_RSYNC_OPTS — removed --delete; arr_cleanup.sh owns orphan enforcement
- lidarr_cleanup.sh — removed HOST1-only guard; runs on any node with Lidarr configured

Config architecture:
- HOST1/HOST2 hostnames moved from master_host*.conf → master.conf (not credentials)
- Sparse checkout now works correctly: each server only needs its own host conf
- detect_hosts() still resolves MY_ID + REMOTE_ID via master.conf hostname values

Bug fix:
- common.sh line 493 — watchdog toggle eval had broken quoting; all SYS_WATCHDOG_CHECK_*
  globals were silently set to empty instead of their configured values

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Docker_Essentials/docker_daily_restart.sh

@@ -66,8 +66,6 @@ if [[ "$EUID" -ne 0 ]]; then
     error "Must be run as root"
     exit 1
 fi
-success "Running as root"
-
 acquire_lock
 
 if ! command -v docker &>/dev/null; then
@@ -75,7 +73,6 @@ if ! command -v docker &>/dev/null; then
     notify "Docker daily restart failed — Docker not found on $(hostname)" "Docker Daily Restart" "warning"
     exit 1
 fi
-success "Docker found"
 
 # detect_hosts() sets MY_ID and aliases HOST*_DAILY_RESTART_CONTAINERS → DAILY_RESTART_CONTAINERS
 detect_hosts
@@ -86,6 +83,8 @@ if [[ ${#DAILY_RESTART_CONTAINERS[@]} -eq 0 ]]; then
     exit 0
 fi
 
+echo "  $MY_ID ($LOCAL_SERVER_NAME) — ${#DAILY_RESTART_CONTAINERS[@]} containers configured"
+
 # ==============================================================================================
 # ━━━ Status ━━━
 # ==============================================================================================
@@ -114,10 +113,10 @@ retry_docker() {
     local attempt=1
 
     while [[ "$attempt" -le "$RETRY_COUNT" ]]; do
-        info "$ICON_RETRY Attempt $attempt of $RETRY_COUNT: $*"
+        log "$ICON_RETRY Attempt $attempt of $RETRY_COUNT: $*"
 
         if "$@"; then
-            success "Succeeded on attempt $attempt"
+            log "Succeeded on attempt $attempt"
             return 0
         else
             warn "Attempt $attempt failed"
@@ -225,7 +224,7 @@ check_dependency_delay() {
 
     local deps="${WATCHDOG_DEPENDENCIES[$container]:-}"
     if [[ -n "$deps" ]] && [[ "$deps" == *"$last"* ]]; then
-        info "Waiting ${CONTAINER_DELAY}s — $container depends on $last..."
+        echo "  Waiting ${CONTAINER_DELAY}s — $container depends on $last..."
         sleep "$CONTAINER_DELAY"
     fi
 }
@@ -240,7 +239,7 @@ retry_docker() {
         info "$ICON_RETRY Attempt $attempt of $RETRY_COUNT: $*"
 
         if docker_cmd "$@"; then
-            success "Succeeded on attempt $attempt"
+            log "Succeeded on attempt $attempt"
             return 0
         else
             warn "Attempt $attempt failed"