MT#63353 Force permissions to 640 for log file

If file is not created, after creation, set it with perm 640
otherwise the following tests will fail

09:46:40 not ok 24 - Command: find /var/log/ngcp/ -maxdepth 1 -type f -size +0 -perm /o+rwx: stdout: Expected "object: *bytes.Reader" to have patterns ["!/./"] the missing elements were ["!/./"]
[sipwise-lab-trunk] root@sp1:~# find /var/log/ngcp/ -maxdepth 1 -type f -size +0 -perm /o+rwx
/var/log/ngcp/ngcp-reminder.log
[sipwise-lab-trunk] root@sp1:~# ls -lah /var/log/ngcp/ngcp-reminder.log
-rw-r--r-- 1 root root 9.3K Nov  7 11:41 /var/log/ngcp/ngcp-reminder.log

Change-Id: Ia441d9cad7db4525c60e6e8d4114ca273226dca5
(cherry picked from commit 852d7c9a08)
(cherry picked from commit 8620ad434b)

ngcp-reminder

@@ -34,6 +34,16 @@ file_formatter = logging.Formatter('%(asctime)s [%(levelname)s] %(message)s')
 file_handler.setFormatter(file_formatter)
 logger.addHandler(file_handler)
 
+# Ensure proper permissions and ownership for the log file
+try:
+    if os.path.exists(LOG_FILE):
+        uid = pwd.getpwnam(OWNER).pw_uid
+        gid = pwd.getpwnam(OWNER).pw_gid
+        os.chown(LOG_FILE, uid, gid)
+        os.chmod(LOG_FILE, 0o640)  # rw-r-----
+except Exception as e:
+    logger.warning(f"Unable to set log file ownership or permissions: {e}")
+
 
 # --- Configuration reader ----------------------------------------------------
 def read_config(path):