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/media_shares_permissions.sh

@@ -2,45 +2,22 @@
 # ==============================================================================================
 # ============================= Media Shares Permissions =======================================
 # ==============================================================================================
-# Applies correct ownership and permissions to all configured media shares.
-# Runs daily via DAILY_MAINTENANCE_SCRIPTS — first job before arr cleanup scripts.
-# Arr cleanup depends on correct ownership to rename and delete files safely.
 #
-# ── WHY THIS EXISTS ───────────────────────────────────────────────────────────────────────────
-# Originally a band-aid for 777 permissions caused by containers running as root.
-# Now a proper daily failsafe — even with correct container config, files can arrive
-# with wrong ownership from:
-#   - rsync without --chown (brings source server's ownership)
-#   - Manual admin copies (creates root:root files)
-#   - New containers not yet configured with correct PUID/PGID
-#   - unRAID updates that reset container environments
+# PURPOSE
+# ─────────────────────────────────────────────────────────────────────────────
+# Apply nobody:users ownership and correct permissions to all media shares.
+# Runs daily as the first job in the maintenance window — arr cleanup depends
+# on correct ownership to rename and delete files.
 #
-# ── PERMISSIONS MODEL ─────────────────────────────────────────────────────────────────────────
-# Directories: 755 nobody:users
-#   Owner (nobody) — rwx  enter, list, create files ✅
-#   Group (users)  — r-x  enter and list ✅
-#   Others         — r-x  Samba guests can browse ✅
-#   No world-write — prevents accidental deletion by unauthenticated access
+# Now a proper daily failsafe: files arrive with wrong ownership from rsync
+# without --chown, manual admin copies, containers with unconfigured PUID/PGID,
+# or unRAID environment resets after updates.
 #
-# Files: 664 nobody:users
-#   Owner (nobody) — rw   read + write ✅
-#   Group (users)  — rw   arrs can import/rename ✅
-#   Others         — r    Samba guests can read ✅
-#   No execute bit — media files are never executable ✅
+# ==============================================================================================
+# OPERATIONAL SAFEGUARDS
+# ==============================================================================================
 #
-# ── DIAGNOSTIC — HIGH CORRECTED COUNT ─────────────────────────────────────────────────────────
-# If this script corrects many files every run, a container has wrong PUID/PGID:
-#   Correct values on unRAID: PUID=99 (nobody) PGID=100 (users)
-#   Add to each container's environment in its Docker template
-#   Common culprits: SABnzbd, qBittorrent, slskd — check these first
-#   Once fixed, this script should correct 0 files per run (pure failsafe)
-#
-# ── HOST AWARENESS ────────────────────────────────────────────────────────────────────────────
-# detect_hosts() sets MY_ID and aliases HOST*_MEDIA_PERMISSION_SHARES → MEDIA_PERMISSION_SHARES
-# Each server only applies permissions to the shares it owns.
-#
-# ── SAFEGUARDS ────────────────────────────────────────────────────────────────────────────────
-#   acquire_lock "wait"  — wait if previous run still active (large share scans take time)
+#   acquire_lock "wait"  — wait if previous run still active (large share scans)
 #   detect_hosts()       — correct share list per host via MY_ID aliases
 #   Empty array guard    — warns and exits cleanly if no shares configured
 #   Folder existence     — skips missing shares with warning, continues others
@@ -48,20 +25,35 @@
 #   validate_unraid_cmd  — notify script validated before use
 #   Silent by default    — only failures produce output, success is silent
 #
-# ── CONFIGURATION (master_host*.conf) ─────────────────────────────────────────────────────────
+# Diagnostic — high corrected count on every run means a container has wrong PUID/PGID:
+#   Correct values on unRAID: PUID=99 (nobody) PGID=100 (users)
+#   Common culprits: SABnzbd, qBittorrent, slskd — check these first
+#   Once fixed, this script should correct 0 files per run (pure failsafe)
+#
+# ==============================================================================================
+# CONFIGURATION
+# ==============================================================================================
+#
+# master_host*.conf
+#
 #   HOST*_MEDIA_PERMISSION_SHARES — shares this host applies permissions to
 #   Aliased by detect_hosts() — script uses MEDIA_PERMISSION_SHARES
 #
-# ── CONFIGURATION (master.conf) ───────────────────────────────────────────────────────────────
+# master.conf
+#
 #   PERMISSIONS_DIR_MODE   — directory permissions (default 755)
 #   PERMISSIONS_FILE_MODE  — file permissions (default 664)
 #   PERMISSIONS_OWNER      — ownership applied to all files (default nobody:users)
 #
-# ── USAGE ─────────────────────────────────────────────────────────────────────────────────────
+# ==============================================================================================
+# RUNTIME MODES
+# ==============================================================================================
+#
 #   media_shares_permissions.sh              — normal run
 #   media_shares_permissions.sh --dry-run    — preview without making changes
 #   media_shares_permissions.sh --log        — verbose output
 #   media_shares_permissions.sh --status     — show config and exit
+#
 # ==============================================================================================
 
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"