Partial fix for mypy issues

core/data_providers.py

@@ -3,6 +3,7 @@ from __future__ import annotations
 import logging
 import threading
 import time
+from collections.abc import Sequence
 from typing import TYPE_CHECKING
 
 from core.config import config, create_provider_from_config
@@ -48,7 +49,7 @@ class DataProviders:
 
     @staticmethod
     def start_providers(
-        providers: list[
+        providers: Sequence[
             SpotProvider | AlertProvider | SolarConditionsProvider | StaticDataProvider | ActivityRefDataProvider | CallsignDataProvider
         ],
         provider_type: str,
@@ -108,13 +109,13 @@ class DataProviders:
                 logger.exception("Exception stopping provider")
 
         threads = [threading.Thread(target=stop_provider, args=(p,), daemon=True) for p in all_providers]
-        for t in threads:
-            t.start()
+        for thread in threads:
+            thread.start()
 
         deadline = time.monotonic() + 15
-        for t in threads:
-            t.join(timeout=max(0.0, deadline - time.monotonic()))
-        still_running = [t for t in threads if t.is_alive()]
+        for thread in threads:
+            thread.join(timeout=max(0.0, deadline - time.monotonic()))
+        still_running = [thread for thread in threads if thread.is_alive()]
         if still_running:
             logger.warning("Some threads did not stop in time!")