fix(worker): use new event loop for Python 3.14+

Switches to asyncio.new_event_loop() for Python 3.14 and above, as
asyncio.get_event_loop() is deprecated. Maintains compatibility with
older Python versions by conditionally selecting the event loop method.

Incorporated fix from python-arq#509 by https://github.com/a3lme

Author: TomFaulkner

arq/worker.py

@@ -3,6 +3,7 @@
 import inspect
 import logging
 import signal
+import sys
 from collections.abc import Sequence
 from dataclasses import dataclass
 from datetime import datetime, timedelta, timezone
@@ -267,7 +268,7 @@ def __init__(
         # self.job_tasks holds references the actual jobs running
         self.job_tasks: dict[str, asyncio.Task[Any]] = {}
         self.main_task: Optional[asyncio.Task[None]] = None
-        self.loop = asyncio.get_event_loop()
+        self.loop = asyncio.get_event_loop() if sys.version_info < (3, 14) else asyncio.new_event_loop()
         self.ctx = ctx or {}
         max_timeout = max(f.timeout_s or self.job_timeout_s for f in self.functions.values())
         self.in_progress_timeout_s = (max_timeout or 0) + 10