Implement the manual scraper trigger endpoint with the following:
- Protected by requireAuth and requireAdmin middleware (401/403)
- Mutex lock check via isScraperRunning to prevent concurrent runs (409)
- Generates UUID jobId for tracking async scrape execution
- Returns 202 Accepted immediately without blocking on scrape completion
- Releases mutex lock in .finally() to ensure cleanup on success or failure
- Logs ADMIN_TRIGGER_SCRAPE activity with jobId, dryRun, and
usingProvidedHtml metadata via activityLogger
- Supports dryRun option (defaults to false) and htmlContent for
testing with pre-fetched HTML
- Passes trigger: 'manual', jobId, dryRun, and htmlContent to runScrape
Includes 20 tests covering auth, mutex, async execution, activity
logging, dryRun/htmlContent options, and response structure.
