fix(log): Fix wrong timezone in logfiles

Since 939f267 the logfiles contained
the UTC timezone which is wrong. This patch changes the code such that
the timezone is set correctly to the **local** timezone of the current
platform.

src/gallia/log.py

@@ -15,6 +15,7 @@
 import socket
 import sys
 import tempfile
+import time
 import traceback
 from collections.abc import Iterator
 from dataclasses import dataclass
@@ -32,7 +33,8 @@
     from logging import _ExcInfoType
 
 
-tz = datetime.datetime.now(datetime.UTC).tzinfo
+gmt_offset = time.localtime().tm_gmtoff
+tz = datetime.timezone(datetime.timedelta(seconds=gmt_offset))
 
 
 @unique