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/sunday_morning_coffee_report.sh

@@ -278,7 +278,7 @@ if command -v zpool >/dev/null 2>&1; then
     while IFS=$'\t' read -r pool health; do
         [[ -z "$pool" ]] && continue
         SKIP=false
-        for ignore in "${ZFS_REPORT_IGNORE_POOLS[@]:-}"; do
+        for ignore in "${ZFS_REPORT_IGNORE_POOLS[@]}"; do
             [[ "$pool" == "$ignore" ]] && SKIP=true && break
         done
         [[ "$SKIP" == true ]] && continue
@@ -297,7 +297,7 @@ if command -v smartctl >/dev/null 2>&1; then
         [[ ! -e "$disk" ]] && continue
         DISK_NAME=$(basename "$disk")
         SKIP=false
-        for ignore in "${SMART_IGNORE_DRIVES[@]:-}"; do
+        for ignore in "${SMART_IGNORE_DRIVES[@]}"; do
             [[ "$DISK_NAME" == "$ignore" ]] && SKIP=true && break
         done
         [[ "$SKIP" == true ]] && continue
@@ -563,7 +563,7 @@ if command -v docker >/dev/null 2>&1; then
     while IFS= read -r name; do
         [[ -z "$name" ]] && continue
         SKIP=false
-        for ignore in "${WATCHDOG_SCAN_IGNORE[@]:-}"; do
+        for ignore in "${WATCHDOG_SCAN_IGNORE[@]}"; do
             [[ "$name" == "$ignore" ]] && SKIP=true && break
         done
         [[ "$SKIP" == false ]] && STOPPED_NAMES+=("$name")
@@ -618,7 +618,7 @@ case "$FO_STATE" in
 esac
 
 if command -v tailscale >/dev/null 2>&1; then
-    REMOTE_TS_IP=$(tailscale ip -4 "$REMOTE_SERVER_NAME" 2>/dev/null)
+    REMOTE_TS_IP=$(tailscale ip -4 "${REMOTE_SERVER_NAME,,}" 2>/dev/null)
     if [[ -n "$REMOTE_TS_IP" ]]; then
         ping -c 1 -W 2 "$REMOTE_TS_IP" >/dev/null 2>&1 && \
             line "  🌐 $REMOTE_ID ($REMOTE_SERVER_NAME): $REMOTE_TS_IP — reachable ✅" || \
@@ -638,7 +638,7 @@ if ! command -v openssl >/dev/null 2>&1; then
 elif [[ ${#CERT_MONITOR_DOMAINS[@]} -eq 0 ]]; then
     line "SSL certs: no domains configured (CERT_MONITOR_DOMAINS empty)"
 else
-    for domain in "${CERT_MONITOR_DOMAINS[@]:-}"; do
+    for domain in "${CERT_MONITOR_DOMAINS[@]}"; do
         [[ -z "$domain" ]] && continue
         EXPIRY=$(echo | timeout "${CERT_TIMEOUT:-10}" openssl s_client \
             -connect "${domain}:443" -servername "$domain" 2>/dev/null | \
@@ -757,7 +757,7 @@ if command -v smartctl >/dev/null 2>&1; then
         [[ ! -e "$disk" ]] && continue
         DISK_NAME=$(basename "$disk")
         SKIP=false
-        for ignore in "${SMART_IGNORE_DRIVES[@]:-}"; do
+        for ignore in "${SMART_IGNORE_DRIVES[@]}"; do
             [[ "$DISK_NAME" == "$ignore" ]] && SKIP=true && break
         done
         [[ "$SKIP" == true ]] && continue