Phase 3: ddns_manager — DDNS client, provider adapters, IP heartbeat

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

api/managers.py

@@ -29,6 +29,7 @@ import firewall_manager
 from auth_manager import AuthManager
 from setup_manager import SetupManager
 from caddy_manager import CaddyManager
+from ddns_manager import DDNSManager
 
 DATA_DIR   = os.environ.get('DATA_DIR',   '/app/data')
 CONFIG_DIR = os.environ.get('CONFIG_DIR', '/app/config')
@@ -57,6 +58,7 @@ cell_link_manager  = CellLinkManager(
 auth_manager = AuthManager(data_dir=DATA_DIR, config_dir=CONFIG_DIR)
 setup_manager = SetupManager(config_manager=config_manager, auth_manager=auth_manager)
 caddy_manager = CaddyManager(config_manager=config_manager, data_dir=DATA_DIR, config_dir=CONFIG_DIR)
+ddns_manager = DDNSManager(config_manager=config_manager, data_dir=DATA_DIR, config_dir=CONFIG_DIR)
 
 # Service logger configuration
 _service_log_configs = {
@@ -91,6 +93,7 @@ __all__ = [
     'email_manager', 'calendar_manager', 'file_manager',
     'routing_manager', 'vault_manager', 'container_manager',
     'cell_link_manager', 'auth_manager', 'setup_manager', 'caddy_manager',
+    'ddns_manager',
     'firewall_manager', 'EventType',
     'DATA_DIR', 'CONFIG_DIR',
 ]