rename: fix remaining failover refs in fallback.sh, fallback_test.sh, array_started.sh, user_script_plug-in.sh

Fallback/fallback.sh

@@ -370,7 +370,7 @@ _abort_fallback_containers() {
 # ==============================================================================================
 # All docker commands wrapped in DOCKER_TIMEOUT.
 # All SSH docker commands wrapped in SSH_TIMEOUT.
-# Verification after start — failover is critical, confirm containers came up.
+# Verification after start — fallback is critical, confirm containers came up.
 
 # Start a container locally and verify it came up
 local_start() {
@@ -996,7 +996,7 @@ while [[ "$FALLBACK_RUNNING" == true ]]; do
                 "Fallback" "warning"
 
         else
-            # Still in failover — check tier escalation
+            # Still in FALLBACK state — check tier escalation
             state_set handback_strikes "0"
 
             TIER2_DELAY=$(get_tier2_delay)
@@ -1092,7 +1092,7 @@ while [[ "$FALLBACK_RUNNING" == true ]]; do
 
             if [[ "$REMOTE_UP" == true ]]; then
                 warn "Remote up, internet up — transitioning through FALLBACK for handback"
-                # Was in failover before DARK — route through FALLBACK state for handback
+                # Was in FALLBACK state before DARK — route through FALLBACK state for handback
                 state_set state "FALLBACK"
                 state_set handback_strikes "0"
             else

Fallback/fallback_test.sh

@@ -148,7 +148,7 @@ if [[ "$EUID" -ne 0 ]]; then
     exit 1
 fi
 
-# FALLBACK_ENABLED gate — no point testing if failover is disabled
+# FALLBACK_ENABLED gate — no point testing if fallback is disabled
 if [[ "${FALLBACK_ENABLED:-false}" == false ]]; then
     warn "FALLBACK_ENABLED=false — fallback test aborted"
     warn "Enable fallback in master.conf before running this test"
@@ -226,7 +226,7 @@ TOTAL_START=$(date +%s)
 phase_pass() { PHASES_PASS+=("$1"); warn "$ICON_DONE  Phase: $1 — PASSED ✅"; }
 phase_fail() { PHASES_FAIL+=("$1"); error "Phase: $1 — FAILED ❌"; }
 
-# Get Tier 1 containers for this server's failover responsibility
+# Get Tier 1 containers for this server's fallback responsibility
 TIER1_VAR="FALLBACK_${MY_ID}_COVERS_${REMOTE_ID}_TIER1"
 eval "TIER1_CONTAINERS=(\"\${${TIER1_VAR}[@]:-}\")"
 

Orchestrators/array_started.sh

@@ -20,7 +20,7 @@
 #     Docker_Essentials/docker_network_connect.sh — ensure networks + container connections
 #
 #   CONTINUOUS (run until array stops):
-#     Fallback/fallback.sh                      — mutual failover monitor
+#     Fallback/fallback.sh                      — mutual fallback monitor
 #
 #   NOTE: watchdogs (docker, system, stability) are NOT launched here.
 #   They run via watchdog_orchestrator.sh every 15 min (cron), not as daemons.

user_script_plug-in.sh

@@ -53,7 +53,7 @@
 #   v1.0 — Initial template
 #   v1.1 — MAX_RSYNC_PROCS removed, --status flag, full directory tree, changelog
 #   v1.2 — Docker Essentials, Media, Transcodes, System Watchdog added
-#   v1.3 — Failover script added
+#   v1.3 — Fallback script added
 #   v1.4 — WebGUI watchdog, ZFS snapshot, Docker network connect, schedules section
 #   v1.5 — media_management.sh orchestrator, corrected filenames, git repo section
 #   v1.6 — lidarr_cleanup.sh, sonarr_cleanup.sh, radarr_cleanup.sh added
@@ -69,7 +69,7 @@
 #   v2.2 — Orchestrators at top with full inline detail. All child scripts listed
 #           individually below for standalone use. Inline descriptions on every entry.
 #           Correct schedules verified against script headers. sunday_morning_coffee_report
-#           and rsync_emby_failover added as separate scheduled entries.
+#           and rsync_emby_fallback added as separate scheduled entries.
 #   v2.3 — intermediate_sync_maintenance.sh new 4-hour orchestrator (arr_sync + artwork).
 #           docker_update.sh + docker_update_remaining.sh: daily/weekly image pulls.
 #           downloaders_reset.sh: slskd + SABnzbd + qBittorrent maintenance.
@@ -402,7 +402,7 @@
 # DIGEST_PROFILE options (master.conf):
 #   always    notify every run regardless — daily digest even when healthy
 #   smart     notify only when something worth reporting is found:
-#               active watchdog strikes, non-NORMAL failover, cert within CERT_WARN_DAYS,
+#               active watchdog strikes, non-NORMAL fallback state, cert within CERT_WARN_DAYS,
 #               bandwidth event exceeded BANDWIDTH_WARN_GB
 #   weekly    notify once per week on DIGEST_DAY (Sunday), silent all other days
 #
@@ -475,7 +475,7 @@
 #   Tier 2 at 4hr:   NextCloud + Immich + Jellyseerr
 #   Tier 3 at 12hr:  AdGuard + Gitea + uptime monitoring
 #   Tier 4 at 24hr:  arrs + downloaders
-# Auth stack (NPM, Authelia, LLDAP) runs warm on both servers always — no failover startup delay.
+# Auth stack (NPM, Authelia, LLDAP) runs warm on both servers always — no fallback startup delay.
 # DDNS: one domain, one DDNS container active at all times. Split-brain prevented by design.
 # Handback: stop remote DDNS → rsync writeback → start containers → start local DDNS.
 #