v0.3.0

Async Support

• extract_async() on ExtractionStage — default wraps sync in executor, zero breaking changes
• Pipeline.run_async() fully async: parallel search, verify, AND extraction phases
• Crawler.crawl_stream() truly parallel via asyncio.Semaphore
• CrawlConfig.max_concurrent for configurable concurrency

Browser Pool

• BrowserPool class: pre-warm and reuse StealthySession instances
• Thread-safe sync + async APIs, idle timeout eviction, stats monitoring
• BrowserPoolExhausted for clear error handling at capacity

Concurrency Config

• PipelineConfig.enable_concurrent_extraction — parallelize across candidates
• PipelineConfig.max_concurrent_candidates

Integration Tests

• tests/conftest.py with pytest markers (integration, network, slow) + flag gating
• tests/integration/ — real-URL end-to-end pipeline tests
• 275 → 284+ tests

Fixed

• CurlCffiStage.can_handle() string-type crash
• crawl_stream(): time.sleep() → asyncio.sleep()