v2 post-migration bug fixes, lidarr_missing_art port, and Partnership SSH/FolderView3 enhancements

Bug fixes across the ecosystem after v1→v2 architecture migration and Unraid 7.2.5 upgrade:

- common.sh: fix _alias_array() phantom empty element (removed [@]:-} pattern), fix
  resolve_remote_ip() with Tailscale FQDN lowercase + awk fallback, add FANART/LASTFM
  key aliases in detect_hosts(), global [@]:-} sweep across 10+ scripts
- webgui_restart.sh: fix emhttp detection (pgrep emhttpd) and restart command for 7.2.5
  (/usr/local/sbin/emhttp stop && start — rc.emhttp removed in 7.2.5)
- bandwidth_monitor.sh, continuous_scripts_status.sh: fix 'local' keyword outside function
- backup_verify.sh: fix resolve_remote_ip() called before detect_hosts()
- Orchestrators: fix script display duplication bug in status output (${entry##*/})
- rsync_stop.sh, git_pull_execute.sh, partnership_manager.sh, coffee_report: lowercase all
  tailscale ip -4 call sites to match Tailscale's lowercase device names
- master_host1.conf: fix SSH key path (gmer4lfe_rsync_automation), add FANART/LASTFM keys
- master_host2.conf: add FANART/LASTFM API keys

New: Media/lidarr_missing_art.sh
- Full ecosystem port of standalone Lidarr artwork fetcher
- Fetches missing album art via fanart.tv + Last.fm APIs
- @tsv batch extraction: 1 jq call per API response vs N*albums (8050 albums in 24s)
- HOST guard (HOST1 only), --status, --dry-run, acquire_lock

New: Initial_run/ssh_setup.sh
- Generates {hostname}_rsync_automation ed25519 keypair (skip if exists, --force to regen)
- ssh-copy-id to remote via Tailscale IP, auto-updates master_host*.conf
- --validate mode: strike tracking (SSH_MAX_STRIKES, SSH_STRIKE_RESET_HRS),
  notify at limit — Tailscale-unreachable remote does NOT count as SSH strike

New: Initial_run/partnership_onboard.sh
- Orchestrator: ssh_setup.sh then partnership_manager.sh --onboard in one command

Partnership/partnership_manager.sh: FolderView3 integration
- Derive partner folder name at runtime (strip unraid- prefix case-insensitively)
- --onboard: create {Mirror}-Failover folder with failover tier containers
- --offboard (both paths): stop + rm containers in folder, remove JSON entry
- --check: calls ssh_setup.sh --validate when IP resolves but SSH state empty
- --status: shows FolderView3 folder state and containers inline

master.conf: SSH_MAX_STRIKES, SSH_STRIKE_RESET_HRS, PARTNERSHIP_FOLDERVIEW3,
PARTNERSHIP_FOLDERVIEW3_URL added to Partnership section

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

Orchestrators/daily_sync_maintenance.sh

@@ -100,17 +100,17 @@ if [[ "$SHOW_STATUS" == true ]]; then
     echo "$ICON_SYNC   Daily enabled:   ${DAILY_RSYNC_ENABLED:-false}"
     echo ""
     echo "━━━ Daily Sync Shares ━━━"
-    for share in "${DAILY_SYNC_SHARES[@]:-}"; do
+    for share in "${DAILY_SYNC_SHARES[@]}"; do
         [[ -n "$share" ]] && echo "  $ICON_SYNC $share"
     done
-    for share in "${PERSONAL_SHARES[@]:-}"; do
+    for share in "${PERSONAL_SHARES[@]}"; do
         [[ -n "$share" ]] && echo "  $ICON_SYNC $share (personal)"
     done
     echo ""
     echo "━━━ Daily Maintenance Scripts ━━━"
-    for entry in "${DAILY_MAINTENANCE_SCRIPTS[@]:-}"; do
+    for entry in "${DAILY_MAINTENANCE_SCRIPTS[@]}"; do
         [[ -z "$entry" ]] && continue
-        echo "  $ICON_GEAR $(basename "${entry%% *}") ${entry#* }"
+        echo "  $ICON_GEAR ${entry##*/}"
     done
     echo "━━━━━━━━━━━━━━━━━━━━━━━"
     exit 0
@@ -122,10 +122,10 @@ fi
 # No manual HOST1/HOST2 comparison needed — aliased automatically per server
 # ==============================================================================================
 ALL_SHARES=()
-for share in "${DAILY_SYNC_SHARES[@]:-}"; do
+for share in "${DAILY_SYNC_SHARES[@]}"; do
     [[ -n "$share" ]] && ALL_SHARES+=("$share")
 done
-for share in "${PERSONAL_SHARES[@]:-}"; do
+for share in "${PERSONAL_SHARES[@]}"; do
     [[ -n "$share" ]] && ALL_SHARES+=("$share")
 done
 SHARE_COUNT=${#ALL_SHARES[@]}
@@ -133,7 +133,7 @@ SHARE_COUNT=${#ALL_SHARES[@]}
 # ── Split maintenance scripts: git pull runs pre-sync, rest run post-sync ─────────────────────
 PRE_SYNC_SCRIPTS=()
 POST_SYNC_SCRIPTS=()
-for script_entry in "${DAILY_MAINTENANCE_SCRIPTS[@]:-}"; do
+for script_entry in "${DAILY_MAINTENANCE_SCRIPTS[@]}"; do
     [[ -z "$script_entry" ]] && continue
     script_name=$(basename "${script_entry%% *}")
     if [[ "$script_name" == "git_pull_execute.sh" ]]; then