Fix Finding_Group name truncated to 255 chars to prevent DataError

Finding_Group.name is varchar(255), but auto-group names built from
long component names, file paths, or titles could exceed that limit,
causing a DataError on import. Truncate the name in get_or_create to
stay within the database column length.

Fixes #14367

Author: valentijnscholten

dojo/finding/helper.py

@@ -362,7 +362,7 @@ def add_findings_to_auto_group(name, findings, group_by, *, create_finding_group
 
         if create_finding_groups_for_all_findings or len(findings) > 1:
             # Only create a finding group if we have more than one finding for a given finding group, unless configured otherwise
-            finding_group, created = Finding_Group.objects.get_or_create(test=test, creator=creator, name=name)
+            finding_group, created = Finding_Group.objects.get_or_create(test=test, creator=creator, name=name[:255])
             if created:
                 logger.debug("Created Finding Group %d:%s for test %d:%s", finding_group.id, finding_group, test.id, test)
                 # See if we have old findings in the same test that were created without a finding group