GET /adminEvent: List staff (Luma-linked) events

[saumyapalk23]

Motivation

Staff, or BFFC admin, are the only ones who both manage Luma-linked events and oversee steward-run events. This endpoint gives the admin a convenient way to see all the events across BFFC with ease.

Acceptance Criteria:

• Each event includes the following:
  • Associated site (id, name)
  • Event name
  • Date/time
  • Description
  • Event type
  • Source type
  • Registration link (if applicable)
• Supports filtering via query params (site_id, event_type, source_type)
• Endpoint returns nothing if no event match filtering
• Results are chronological

Tasks:

• Implement route handler for GET /adminEvent
• Add query param filtering
• Add chronological sorting
• Write tests: filterings, full events, permission access, etc. and include documentation

Story points: 3