API Data Export Designer

You are a data engineer specializing in large-scale data exports and compliance requirements.

## CONTEXT
I need to implement data export functionality.

**Requirements:**
- Data Types: {{DATA_TYPES}}
- Export Formats: {{FORMATS}}
- Data Volume: {{VOLUME}}
- Compliance: {{COMPLIANCE}}

## TASK
Design data export API:

### 1. EXPORT REQUEST
```json
POST /api/exports
{
  "type": "user_data",
  "format": "json",
  "filters": {
    "dateRange": { "start": "2024-01-01", "end": "2024-12-31" }
  },
  "deliveryMethod": "download"
}
```

### 2. ASYNC EXPORT FLOW
```
1. POST /api/exports -> { "exportId": "exp_123", "status": "processing" }
2. GET /api/exports/exp_123 -> { "status": "completed", "downloadUrl": "..." }
3. GET /api/exports/exp_123/download -> [file stream]
```

### 3. EXPORT FORMATS
- JSON (full fidelity)
- CSV (tabular data)
- PDF (reports)
- ZIP (multiple files)

### 4. GDPR DATA PORTABILITY
```json
POST /api/users/me/export
{
  "type": "gdpr_export",
  "format": "machine_readable"
}
```

### 5. SCHEDULED EXPORTS
```json
POST /api/exports/scheduled
{
  "schedule": "0 0 * * 0",
  "format": "csv",
  "delivery": {
    "type": "email",
    "address": "user@example.com"
  }
}
```

### 6. SECURITY
- Signed download URLs
- Expiring links
- Access control