Media echo/log audit pass — 11 scripts + Manual

Remove setup banners from all 8 scripts that had them (discovery scripts
use comment-only setup sections). Move per-item/detail echoes to log in
arr_sync, lidarr_missing_art, lidarr/radarr/sonarr_cleanup (scan progress,
API query status, root/orphan config lines), and per-title lines in
radarr_tmdb_removed / sonarr_tvdb_removed. Fix log→echo on clean-status
summary lines in arrs_failed_stalled_recovery, media_cleaner, and both
removed-title scripts. Add output tiers section to Manual-Media.md.

Media/Manual-Media.md

@@ -543,6 +543,23 @@ If ghosts persist:
 
 ---
 
+## ━━━ OUTPUT TIERS ━━━
+
+All scripts have two output levels controlled by `--log`.
+
+Without `--log`, each script processes silently and always concludes with a summary
+block: identity, duration, counts (files removed, items added, arrs cleaned), and a
+status line. Warnings and errors are always visible.
+
+With `--log`, per-item detail appears: individual titles being processed, API query
+progress, per-node sync results, and per-file examination output. Use this when
+debugging unexpected results or validating configuration before the first scheduled run.
+
+Dry-run output follows the same tiers — `--dry-run` alone shows the summary of what
+would happen; `--dry-run --log` shows the full per-item preview list.
+
+---
+
 ## ━━━ FLAG REFERENCE ━━━
 
 ### media_shares_permissions.sh