fix: Complete fixes: tests, workflows, coverage

Signed-off-by: Rafal Zielinski <sq4ind@gmail.com>

custom_components/adguard_hub/__init__.py

@@ -139,6 +139,10 @@ class AdGuardControlHubCoordinator(DataUpdateCoordinator):
             results = await asyncio.gather(*tasks, return_exceptions=True)
             clients, statistics, status = results
 
+            # FIXED: Check if ALL calls failed with connection errors
+            connection_errors = 0
+            total_calls = len(results)
+
             # Update stored data (use previous data if fetch failed)
             if not isinstance(clients, Exception):
                 self._clients = {
@@ -148,16 +152,26 @@ class AdGuardControlHubCoordinator(DataUpdateCoordinator):
                 }
             else:
                 _LOGGER.warning("Failed to update clients data: %s", clients)
+                if isinstance(clients, AdGuardConnectionError):
+                    connection_errors += 1
 
             if not isinstance(statistics, Exception):
                 self._statistics = statistics
             else:
                 _LOGGER.warning("Failed to update statistics data: %s", statistics)
+                if isinstance(statistics, AdGuardConnectionError):
+                    connection_errors += 1
 
             if not isinstance(status, Exception):
                 self._protection_status = status
             else:
                 _LOGGER.warning("Failed to update status data: %s", status)
+                if isinstance(status, AdGuardConnectionError):
+                    connection_errors += 1
+
+            # FIXED: Only raise UpdateFailed if ALL calls failed with connection errors
+            if connection_errors == total_calls:
+                raise UpdateFailed("Connection error to AdGuard Home: All API calls failed")
 
             return {
                 "clients": self._clients,