feat: rename array orchestrators, add docker_update remainder mode

- Rename array_start.sh → array_started.sh, array_stop.sh → array_stopping.sh
  to clarify these are event-driven (array has started/is stopping), not imperative
- Update all references across 9 files (master.conf, user_script_plug-in.sh,
  watchdogs, continuous_scripts_status.sh, claude_startup.sh)
- Add --remainder mode to docker_update.sh: updates all running containers
  excluding daily containers, weekly sync-window containers (emby + critical-data),
  and fallback coverage containers (FALLBACK_${MY_ID}_COVERS_${REMOTE_ID}_TIER*)
  Fallback containers excluded because the remote server owns their version —
  independent updates risk writeback incompatibility on handback
- weekly_sync_maintenance.sh calls docker_update.sh --remainder as final step
- git_pull_execute.sh: add safe.directory config to fix dubious ownership error
  when running as root on a directory owned by uid 1000

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

Monitors/continuous_scripts_status.sh

@@ -140,7 +140,7 @@ if is_script_running "system_watchdog"; then
     echo "  ⏱️  Interval: ${SYSTEM_WATCHDOG_INTERVAL}s │ Heartbeat every: ${SYSTEM_WATCHDOG_HEARTBEAT_HOURS}hr"
 else
     echo "  ❌ NOT RUNNING — system_watchdog.sh is not active"
-    echo "     Start via: bash Orchestrators/array_start.sh"
+    echo "     Start via: bash Orchestrators/array_started.sh"
 fi
 
 echo ""
@@ -254,7 +254,7 @@ if is_script_running "docker_watchdog"; then
     echo "  ⏱️  Interval: ${DOCKER_WATCHDOG_INTERVAL}s │ Heartbeat every: ${DOCKER_WATCHDOG_HEARTBEAT_HOURS}hr"
 else
     echo "  ❌ NOT RUNNING — docker_watchdog.sh is not active"
-    echo "     Start via: bash Orchestrators/array_start.sh"
+    echo "     Start via: bash Orchestrators/array_started.sh"
 fi
 
 echo ""
@@ -400,7 +400,7 @@ else
         echo "  ⏸️  Disabled — FALLBACK_ENABLED=false in master.conf"
     else
         echo "  ❌ NOT RUNNING — fallback.sh is not active"
-        echo "     Start via: bash Orchestrators/array_start.sh"
+        echo "     Start via: bash Orchestrators/array_started.sh"
     fi
 fi