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

unRAID_Essentials/mover_stop.sh

@@ -2,44 +2,74 @@
 # ==============================================================================================
 # ================================= Mover Stop =================================================
 # ==============================================================================================
-# Safely stops the unRAID mover process with a warning before halting.
-# Warns all logged-in users via wall message, waits the configured timeout, then stops.
 #
-# ── WHEN TO USE ───────────────────────────────────────────────────────────────────────────────
-#   - Before a planned reboot when mover is running mid-cycle
-#   - Before disk replacement or array operations that need mover stopped
-#   - Before rsync — mover and rsync simultaneously moving the same files causes corruption
-#   - Called automatically by maintenance scripts that need the mover stopped first
+# PURPOSE
+# ─────────────────────────────────────────────────────────────────────────────
+# Safely stops the unRAID mover with a wall warning, configurable timeout, and
+# SIGTERM → SIGKILL sequence. Use before planned reboots, disk operations, or
+# any operation where mover and rsync running simultaneously could corrupt files.
+# Exits cleanly if mover is not running.
 #
-# ── STOP SEQUENCE ─────────────────────────────────────────────────────────────────────────────
+# ==============================================================================================
+# OPERATIONAL MODEL
+# ==============================================================================================
+#
+# Stop Sequence
 #   1. Check if mover is running — exit cleanly if not
-#   2. Broadcast wall warning to all logged-in users
-#   3. Wait MOVER_STOP_TIMEOUT seconds (default 30) — gives active sessions a chance to note it
-#   4. Send SIGTERM — mover can complete its current file operation before exiting
-#   5. Wait 5 seconds for graceful exit
-#   6. Verify stopped — if still running send SIGKILL (force)
+#   2. Wall message to all logged-in terminal users
+#   3. Wait MOVER_STOP_TIMEOUT seconds
+#   4. SIGTERM — allows mover to finish its current file before stopping
+#      (no partial files — the mover completes what it is working on)
+#   5. Wait 5 seconds → verify stopped
+#   6. SIGKILL if still running — forced stop, partial files possible
 #   7. Final verify — error if still running after SIGKILL
 #
-# ── SIGTERM vs SIGKILL ────────────────────────────────────────────────────────────────────────
-# SIGTERM first — allows mover to finish the file it is currently moving (no partial files).
-# SIGKILL only as fallback — forces immediate stop (may leave partial files on cache or array).
+# SIGTERM first because the mover has an opportunity to finish the file it is
+# currently moving, leaving no partial copies on cache or array. SIGKILL is only
+# used as a last resort and may leave a file split across cache and array.
 #
-# ── SAFEGUARDS ────────────────────────────────────────────────────────────────────────────────
-#   acquire_lock     — prevents concurrent stop attempts racing each other
-#   Root check       — pkill on emhttp processes requires root
-#   validate_unraid  — notify validated before use
-#   SIGTERM → verify → SIGKILL sequence — graceful then forced
-#   Final verify     — confirms mover actually stopped
-#   Silent on clean  — mover not running = log() only, no output ✅
+# ==============================================================================================
+# OPERATIONAL SAFEGUARDS
+# ==============================================================================================
 #
-# ── CONFIGURATION (master.conf) ───────────────────────────────────────────────────────────────
-#   MOVER_STOP_TIMEOUT — seconds to warn users before stopping (default 30)
+# Single Instance Lock
+#   acquire_lock prevents concurrent stop attempts racing each other.
+#
+# Root Required
+#   pkill on emhttp processes requires root.
+#
+# Final Verify
+#   Confirms mover is actually stopped after the kill sequence — errors if it
+#   is still running after SIGKILL.
+#
+# Silent When Clean
+#   Mover not running = log() only, no visible output.
+#
+# ==============================================================================================
+# CONFIGURATION
+# ==============================================================================================
+#
+# master.conf
+#
+#   MOVER_STOP_TIMEOUT
+#       Seconds between wall warning and SIGTERM. (default: 30)
+#
+# ==============================================================================================
+# RUNTIME MODES
+# ==============================================================================================
+#
+# mover_stop.sh
+#     Check if mover is running. If so, warn users and stop it.
+#
+# mover_stop.sh --dry-run
+#     Show mover state and what would happen. No signals sent.
+#
+# mover_stop.sh --status
+#     Show mover state (running, PID, start time). Then exit.
+#
+# mover_stop.sh --log
+#     Verbose output showing each step of the stop sequence.
 #
-# ── USAGE ─────────────────────────────────────────────────────────────────────────────────────
-#   mover_stop.sh              — stop mover with configured timeout
-#   mover_stop.sh --dry-run    — show what would happen
-#   mover_stop.sh --status     — show mover state
-#   mover_stop.sh --log        — verbose output
 # ==============================================================================================
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"