# Task: Core Enhancements (Tours, Attendance, Tags)

## Objective

Implement missing core entities that are essential for a complete fandom archive.

## Steps

- [x] **Backend**:
  - [x] Create `Tour` model (name, start_date, end_date, notes).
  - [x] Create `Artist` model (name, instrument, notes) and `ShowArtist`/`PerformanceArtist` link tables.
  - [x] Update `Show`, `Venue`, `Song` models to include `notes: Optional[str]`.
  - [x] Update `Show` model to include `tour_id`.
  - [x] Create `Attendance` model (user_id, show_id, notes).
  - [x] Create `Tag` model (name, slug) and `EntityTag` link table.
  - [x] Update Schemas and API Routers.
  - [x] Generate and apply migrations.
- [x] **Frontend**:
  - [x] Add "I was there" button to Show Detail page.
  - [x] Display Tour info on Show Detail page.
  - [x] Display Tags on Show/Song pages.

## Acceptance Criteria

- Users can mark attendance.
- Shows belong to a Tour.
- Content can be tagged.