Poll enrichment job status and get results.

Returns results progressively — partial results are available while the job is still running, as each batch of items completes processing.

Flow:

1. Submit enrichment with async_mode=true → get job_id
2. Poll this endpoint — results appear incrementally as items are processed
3. When status changes to completed, all results are ready

Pagination:

• page: Page number (1-indexed, default: 1)
• page_size: Results per page (default: 1000)
• Response includes page, page_size, total_pages, completed_items

Statuses:

• running: Job is still processing (partial results may be available)
• completed: Job finished, all results ready
• failed: Job failed or was cancelled (partial results may still be available)

Example:

GET /api/public/enrich/{job_id}?page=1&page_size=50

Response (running, partial results):
{
    "job_id": "08aa2b0d-...",
    "status": "running",
    "results": [
        {"after_data": {...}, "before_data": {...}, "sources": {...}}
    ],
    "total_items": 500,
    "completed_items": 200,
    "successful": 0,
    "credits_used": 0,
    "page": 1,
    "page_size": 50,
    "total_pages": 4
}