- Fix audio presign 404: MinIO upload is now synchronous before response is sent,
eliminating the race where presign was called before the file landed in MinIO
- Replace all Browserless usage with direct HTTP client across catalogue, metadata,
ranking, and browse — novelfire.net pages are server-rendered and don't need a
headless browser; direct is faster and more reliable
- Harden handleBrowse with 3-attempt retry loop, proper backoff, and full
browser-like headers to reduce 502s from novelfire.net bot detection
- Remove Browserless env vars (BROWSERLESS_URL/TOKEN/STRATEGY) from main.go;
add SCRAPER_TIMEOUT as a single timeout knob
- Clean up now-dead rejectResourceTypes var and Browserless-specific WaitFor/
RejectResourceTypes/GotoOptions fields from scraper calls
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