rename appdata-Failover→appdata-Fallback in docs; critical sync 15→30min; transcode 3→7min

appdata-Failover → appdata-Fallback:
  All .md files updated — scripts and confs already used appdata-Fallback.
  Share was renamed; docs were the only stale references.

critical_sync_maintenance.sh: */15 → */30, 96/day → 48/day:
  critical_sync_maintenance.sh header, master.conf, host1/2.conf comments,
  Orchestrators README, User Script Plug-in README, Partnership README/manual/script,
  Docker_Essentials README/downloaders_reset.sh, Fallback README,
  weekly_sync_maintenance.sh, user_script_plug-in.sh all updated.

rsync_emby_failover User Script superseded:
  Emby dirty sync was already in HOST1_CRITICAL_SYNC_SHARES — it now runs inside
  critical_sync_maintenance.sh every 30min alongside auth sync and partnership check.
  Section in User Script Plug-in README marked for deletion from plugin.

transcode_management.sh: */3 → */7:
  transcode_management.sh, transcode_manager.sh, transcode_cleanup.sh headers,
  Transcodes README/manual, Orchestrators README, User Script Plug-in README,
  user_script_plug-in.sh all updated.

Transcodes/Manual-Transcoding.md

@@ -26,11 +26,11 @@ All three scripts follow a two-tier output model: `echo` lines are always visibl
 **ramdisk_setup.sh** — one-shot at array start. Without `--log`, section headers
 and the final summary are visible. Per-step creation detail suppressed.
 
-**transcode_manager.sh** — runs every 3 minutes. Without `--log`, only state
+**transcode_manager.sh** — runs every 7 minutes. Without `--log`, only state
 transitions (flips, warnings, errors) and active session display are shown. When
 nothing changes, a single one-line confirmation is printed. Per-check detail suppressed.
 
-**transcode_cleanup.sh** — runs every 3 minutes. Without `--log`, the cleanup
+**transcode_cleanup.sh** — runs every 7 minutes. Without `--log`, the cleanup
 summary (files removed, space freed) is always visible. Per-file deletion detail
 suppressed.
 
@@ -376,7 +376,7 @@ At Startup of Array (via array_started.sh in unRAID_Essentials/):
   ramdisk_setup.sh     — creates ramdisk, symlink, transcoding-temp
                          Must run BEFORE Emby starts
 
-Every 3 minutes (via transcode_management.sh in Orchestrators/):
+Every 7 minutes (via transcode_management.sh in Orchestrators/):
   1. transcode_cleanup.sh  — remove stale files, check flip-back
   2. transcode_manager.sh  — check usage, flip if needed, display sessions
 

Transcodes/README-Transcoding.md

@@ -49,7 +49,7 @@ it at mount time. Both protections together prevent this permanently.
 **lsof Per File on a Live TV System**  
 Early cleanup called `lsof filename` per file to check if anything had it open. On a busy
 Live TV night with 5 simultaneous streams, the ramdisk contains thousands of HLS segment
-files — thousands of subprocess calls every 3 minutes.  
+files — thousands of subprocess calls every 7 minutes.  
 Fix: lsof called once per location to build a complete open-file map. All subsequent
 checks are O(1) lookups against that map.
 
@@ -82,7 +82,7 @@ unRAID_Essentials/
 Orchestrators/
   transcode_management.sh ──── cleanup first ──► transcode_cleanup.sh
                            ──── then manager ──► transcode_manager.sh
-                           (every 3 minutes — order non-negotiable)
+                           (every 7 minutes — order non-negotiable)
 
 Monitors/
   weekly_health_digest.sh ◄─── reads ──────────── TRANSCODE_DAILY_LOG
@@ -121,7 +121,7 @@ Emby starts, reads transcode path from config
     All new sessions write to: /mnt/ram-transcode → /mnt/ramdisk_transcodes/
 
 
-Every 3 minutes (transcode_management.sh):
+Every 7 minutes (transcode_management.sh):
     │
     ├─ transcode_cleanup.sh
     │    Remove files older than TRANSCODE_MAX_AGE, not open by any process

Transcodes/transcode_cleanup.sh

@@ -20,7 +20,7 @@
 #
 # lsof Called Once, Not Per File
 #   On a busy Live TV system the ramdisk contains thousands of HLS segment files.
-#   Calling lsof once per file creates thousands of subprocess calls every 3 minutes.
+#   Calling lsof once per file creates thousands of subprocess calls every 7 minutes.
 #   lsof is called once per location to build a complete open-file map. All subsequent
 #   checks are O(1) lookups against that map — thousands of files, one lsof call.
 #
@@ -59,7 +59,7 @@
 #   `! -name "transcoding-temp"` in the find command — protected unconditionally.
 #
 # Silent by Default
-#   Runs every 3 minutes — must not produce noise when healthy.
+#   Runs every 7 minutes — must not produce noise when healthy.
 #
 # ==============================================================================================
 # CONFIGURATION

Transcodes/transcode_manager.sh

@@ -6,7 +6,7 @@
 # PURPOSE
 # ─────────────────────────────────────────────────────────────────────────────
 # Monitors ramdisk usage and manages the transcode symlink direction. Called by
-# transcode_management.sh (Orchestrators/) every 3 minutes — always after
+# transcode_management.sh (Orchestrators/) every 7 minutes — always after
 # transcode_cleanup.sh runs first. Must be fast, non-blocking, and silent when
 # nothing has changed.
 #
@@ -59,7 +59,7 @@
 #   validate_unraid_cmd confirms the notify script is present before use.
 #
 # Silent by Default
-#   Runs every 3 minutes — only speaks when something changes or needs attention.
+#   Runs every 7 minutes — only speaks when something changes or needs attention.
 #
 # ==============================================================================================
 # CONFIGURATION