Allow Staff and Admin to see unpublished events

[hugoliu-code]

Description

Changed the GET /events endpoint

• Replaced "include_unpublished" url parameter to "scope"
• scope=all will return ALL events, unpublished or published, and is protected behind superuser permissions
• scope=scoped will return all published events, as well as unpublished events the user is a staff or admin for
• scope=published will return all published events
• no parameter will default to published events only

New goose migration file to create new enum for type safety

Updated api call in frontend to GET /events?scope=scoped on portal page

Updated admin call to GET /events as well

New helper function in parser folder to help validate the scope parameter

Linked Jira Ticket

https://swamphacks.atlassian.net/jira/software/projects/TECH/boards/1?selectedIssue=TECH-195

Type of Change

Refactor

Checklist

• My code follows the project's style guidelines
• I have commented on complex parts of the code
• I have updated documentation if necessary
• I have updated or added tests to cover my changes
• I have updated the OpenAPI YAML or other API schema files if applicable

Additional Notes