feat: slskd reconnect guard in downloaders_reset, mass v2 sync

- downloaders_reset: connection check block before slskd API sections;
  triggers PUT /api/v0/server reconnect if disconnected, polls 60s,
  gates Stuck Searches and Dead Transfer Records on SLSKD_CONNECTED
- Sync all modified/new/deleted files from v2 refactor across Docker_Essentials,
  Media, Monitors, Partnership, Rsync, Tools, Transcodes, unRAID_Essentials,
  common.sh, master confs, and new Manual/README docs

Tools/watchdog_skip_list_manager.sh

@@ -2,51 +2,73 @@
 # ==============================================================================================
 # =========================== Watchdog Skip List Manager =======================================
 # ==============================================================================================
+#
+# PURPOSE
+# ─────────────────────────────────────────────────────────────────────────────
 # View and manage the persistent container skip list used by docker_watchdog.sh.
+# docker_watchdog.sh adds a container to the skip list when it exceeds
+# WATCHDOG_CONTAINER_RESTART_LIMIT restarts within WATCHDOG_CONTAINER_RESTART_WINDOW
+# hours — prevents infinite restart loops on containers that keep crashing.
 #
-# ── WHAT THE SKIP LIST IS ─────────────────────────────────────────────────────────────────────
-# docker_watchdog.sh adds a container to the skip list when it exceeds the restart loop
-# limit (WATCHDOG_CONTAINER_RESTART_LIMIT in WATCHDOG_CONTAINER_RESTART_WINDOW hours).
-# Once on the skip list the watchdog stops restarting it — prevents infinite restart loops.
+# Skip list persists on /boot/config (survives reboots). Auto-clears when
+# docker_watchdog.sh sees the container running on a later cycle. Use this
+# script to clear manually after fixing the underlying problem.
 #
-# Skip list persists on /boot/config — survives reboots.
-# Auto-clears when docker_watchdog.sh sees the container running on a cycle.
-# This script clears it manually when you have fixed the underlying problem.
+# ==============================================================================================
+# OPERATIONAL MODEL
+# ==============================================================================================
 #
-# ── ACTIONS ───────────────────────────────────────────────────────────────────────────────────
-#   --status                     — show skip list, container states, restart history
-#   --clear ContainerName        — clear a specific container from skip list + history
-#   --clear-all                  — clear all skip lists and restart history
+# Skip List Lifecycle
+#   1. Container crashes repeatedly → watchdog adds to skip list, notifies
+#   2. Watchdog stops restarting the container on subsequent cycles
+#   3a. If container recovers on its own (Docker restart policy), watchdog
+#       sees it running, removes from skip list automatically
+#   3b. If stuck stopped → fix the root cause, clear via this script, then
+#       docker start ContainerName manually
+#   4. Watchdog monitors normally on next cycle. If it crashes again → re-added.
 #
-# ── AFTER CLEARING ────────────────────────────────────────────────────────────────────────────
-#   1. Fix whatever was causing the container to fail
-#   2. Start it manually: docker start ContainerName
-#   3. docker_watchdog.sh monitors it normally on the next cycle
-#   4. If it crashes again → watchdog adds it back and notifies
+# ==============================================================================================
+# OPERATIONAL SAFEGUARDS
+# ==============================================================================================
 #
-# ── SKIP LIST AUTO-CLEAR ──────────────────────────────────────────────────────────────────────
-# docker_watchdog.sh auto-clears a container from the skip list when it sees it running.
-# So if a container recovers on its own (Docker restart policy eventually works),
-# the watchdog will see it running, remove it from the skip list, and resume monitoring.
-# Manual clear only needed when container is stuck stopped and needs intervention.
+# Single Instance Lock
+#   acquire_lock prevents concurrent access with docker_watchdog.sh writing
+#   the same files.
 #
-# ── SAFEGUARDS ────────────────────────────────────────────────────────────────────────────────
-#   acquire_lock         — prevents concurrent access with docker_watchdog.sh writing files
-#   docker_watchdog check — warns if watchdog is running during clear (could re-add instantly)
-#   DOCKER_TIMEOUT       — docker inspect calls protected against daemon hangs
-#   Confirmation required — interactive: YES | non-interactive: --force flag
-#   validate_unraid_cmd  — notify validated before use
+# Active Watchdog Detection
+#   Warns if docker_watchdog.sh is currently running when a clear is attempted
+#   — the watchdog could re-add the container to the skip list within seconds.
 #
-# ── FILES MANAGED ─────────────────────────────────────────────────────────────────────────────
-#   SYS_WATCHDOG_FAILED_FILE        — persistent container skip list
-#   WATCHDOG_CONTAINER_RESTART_LOG  — restart history for loop detection
+# Docker Timeout
+#   DOCKER_TIMEOUT caps docker inspect calls against a hung daemon.
+#
+# Confirmation Required
+#   Interactive mode prompts for YES before clearing. Use --force for scripts.
+#
+# ==============================================================================================
+# STATE FILES
+# ==============================================================================================
+#
+#   SYS_WATCHDOG_FAILED_FILE        — persistent container skip list (on /boot/config)
+#   WATCHDOG_CONTAINER_RESTART_LOG  — restart history used for loop detection
+#
+# ==============================================================================================
+# RUNTIME MODES
+# ==============================================================================================
+#
+# watchdog_skip_list_manager.sh [--status]
+#     Show skip list, container states, and recent restart history.
+#
+# watchdog_skip_list_manager.sh --clear ContainerName
+#     Remove a specific container from the skip list and clear its restart history.
+#     Prompts for YES unless --force is passed.
+#
+# watchdog_skip_list_manager.sh --clear-all
+#     Clear all skip lists and all restart history.
+#     Prompts for YES unless --force is passed.
+#
+# All actions support --dry-run (show what would change) and --force (skip prompt).
 #
-# ── USAGE ─────────────────────────────────────────────────────────────────────────────────────
-#   watchdog_skip_list_manager.sh                       — show status
-#   watchdog_skip_list_manager.sh --status              — show status explicitly
-#   watchdog_skip_list_manager.sh --clear ContainerName — clear specific container
-#   watchdog_skip_list_manager.sh --clear-all           — clear everything
-#   Any action supports --dry-run and --force
 # ==============================================================================================
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"