Move Borg repo to local backups and remove JuiceFS

Use /mnt/borg-backups in place of /mnt/object_storage for Borg.

Remove JuiceFS and Redis artifacts (tasks, templates, service configs)
and delete borg-local-sync tooling. Update borg-backup service
ReadWritePaths, remove Plex slow tvshows mount, add system sysctl
performance tunings, and apply minor code and flake.lock updates.

bin/actions/service.py

@@ -2,10 +2,10 @@
 
 """Manage Docker services."""
 
-import os
-import sys
-import subprocess
 import argparse
+import os
+import subprocess
+import sys
 
 # Import helper functions
 sys.path.append(os.path.join(os.path.dirname(__file__), ".."))
@@ -14,7 +14,7 @@ from helpers.functions import printfe, println
 # Base directory for Docker services $HOME/services
 SERVICES_DIR = os.path.join(os.path.expanduser("~"), ".services")
 # Protected services that should never be stopped
-PROTECTED_SERVICES = ["juicefs-redis"]
+PROTECTED_SERVICES = []
 
 
 def get_service_path(service_name):

bin/actions/source.py

@@ -3,8 +3,8 @@
 """Generate export commands for Borg environment variables."""
 
 import os
-import sys
 import subprocess
+import sys
 
 # Add the bin directory to the path
 sys.path.append(os.path.join(os.path.dirname(__file__), ".."))
@@ -45,7 +45,7 @@ def main():
 
     # Generate the export commands
     exports = [
-        'export BORG_REPO="/mnt/object_storage/borg-repo"',
+        'export BORG_REPO="/mnt/borg-backups"',
         f'export BORG_PASSPHRASE="{passphrase}"',
         'export BORG_CACHE_DIR="/home/menno/.config/borg/cache"',
         'export BORG_CONFIG_DIR="/home/menno/.config/borg/config"',