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

Media/playback_aware_lidarr_discovery.sh

@@ -1,24 +1,17 @@
 #!/bin/bash
 # ==============================================================================================
-# =============================== LIDARR DISCOVERY =============================================
+# =========================== Playback-Aware Lidarr Discovery ==================================
 # ==============================================================================================
-# Lidarr discovery orchestrator.
 #
-# Consumes:
-#   Kernel/decision_engine.sh
+# PURPOSE
+# ─────────────────────────────────────────────────────────────────────────────
+# Behavior-driven music discovery scoring prototype. Consumes
+# Kernel/decision_engine.sh to score artist/album candidates for acquisition
+# using family-aware and playback-weighted logic.
 #
-# Purpose:
-#   Discover high-quality artists/albums for acquisition using
-#   family-aware and behavior-driven scoring logic.
-#
-# This script is intentionally selective.
-#
-# Music discovery is treated differently than TV/movies:
-#
-#   Higher strictness
-#   Stronger quality bias
-#   Lower tolerance for trend chasing
-#   Longer behavioral memory
+# WIP — not yet connected to a live data source or scheduled. Discovery logic
+# is intentionally selective: higher strictness, stronger quality bias, lower
+# tolerance for trend-chasing, longer behavioral memory than TV/movies.
 #
 # ==============================================================================================