Make created_at_local not have timezone field

[epou]

Thinking on how SDKs are parsing directly this field.

For example, for Dart, it does not store the TZ and it directly converted to UTC and the original TZ it's lost -> dart-lang/sdk#54993

[Copilot]

Pull Request Overview

This PR modifies the created_at_local field to return datetime values without timezone information. The change affects the API serializer to strip timezone data and updates test schemas and expectations accordingly.

• Updated get_created_at_local method to remove timezone information using replace(tzinfo=None)
• Modified test schemas to expect datetime format without timezone offset patterns
• Updated test data expectations to use timezone-naive datetime strings

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
api/serializers.py	Modified get_created_at_local to strip timezone and updated help text
api/tests/integration/observations/schema.yml	Updated regex pattern to expect datetime without timezone
api/tests/integration/observations/create.tavern.yml	Changed test expectations to use timezone-naive datetimes
api/tests/integration/identification_tasks/schema.yml	Updated regex pattern to expect datetime without timezone
api/tests/integration/identification_tasks/assignments/schema.yml	Updated regex pattern to expect datetime without timezone
api/tests/integration/breeding_sites/schema.yml	Updated regex pattern to expect datetime without timezone
api/tests/integration/breeding_sites/create.tavern.yml	Changed test expectations to use timezone-naive datetimes
api/tests/integration/bites/schema.yml	Updated regex pattern to expect datetime without timezone
api/tests/integration/bites/create.tavern.yml	Changed test expectations to use timezone-naive datetimes

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[Copilot]

The help text is unclear about the purpose and implications of removing timezone information. Consider: 'The date and time when the record was created, displayed in local time without timezone offset. Consumers must track timezone separately if needed.'

Suggested change

	help_text="The date and time when the record was created, displayed without timezone field."
	help_text="The date and time when the record was created, displayed in local time without timezone offset. Consumers must track timezone separately if needed."