fix widespread naming errors across all docs — array_started, fallback, FALLBACK_

array_start.sh → array_started.sh (bulk rename — actual file has always been
array_started.sh; docs consistently used the wrong name across 9 files)

failover.sh → fallback.sh (bulk rename — script is Fallback/fallback.sh;
docs used the old name throughout)

FAILOVER_HOST2_RUNS_FOR_HOST1_TIER1 → FALLBACK_HOST2_COVERS_HOST1_TIER1
(README.md — wrong variable name, actual vars use FALLBACK_ prefix and
COVERS_ not RUNS_FOR_)

docker_watchdog.sh attribution: "started by array_started.sh" → "called every
minute by watchdog_orchestrator.sh" (docker_watchdog is not in ARRAY_START_SCRIPTS)

server_reboot.sh shutdown sequence: step 7 "rc.docker stop" → calls
array_stopping.sh (user_scripts, fallback, rsync, mover, docker_container_stop)

Rsync manual ARRAY_START_SCRIPTS list: removed stability_watchdog and
docker_watchdog (now in watchdog_orchestrator); failover → fallback

Transcodes/Manual-Transcoding.md

@@ -179,7 +179,7 @@ ls /mnt/ramdisk_transcodes/
 ### Usage
 
 ```bash
-ramdisk_setup.sh              # normal run (called by array_start.sh)
+ramdisk_setup.sh              # normal run (called by array_started.sh)
 ramdisk_setup.sh --dry-run    # show what would be created without creating
 ramdisk_setup.sh --status     # show current ramdisk, symlink, and SSD state
 ramdisk_setup.sh --log        # verbose — show each creation step
@@ -372,7 +372,7 @@ TRANSCODE_SERVERS=(
 ## Schedule
 
 ```
-At Startup of Array (via array_start.sh in unRAID_Essentials/):
+At Startup of Array (via array_started.sh in unRAID_Essentials/):
   ramdisk_setup.sh     — creates ramdisk, symlink, transcoding-temp
                          Must run BEFORE Emby starts