Andy 99be88dc08 feat(session): replace curl_cffi with rnet for TLS-fingerprinted HTTP ...

Replace CurlSession (curl_cffi) with RnetSession powered by rnet (Rust/BoringSSL). Benchmarks show 3.5x faster segmented downloads (1.06 GB/s vs 304 MB/s) and 16% faster single-file downloads with near-zero TLS fingerprinting overhead.

- Add RnetSession wrapper with requests-compatible API (headers, cookies, proxies, retry logic, prepared requests)
- Add RnetResponse wrapper normalizing rnet quirks (status_code as int, text as property, bytes-to-str headers, iter_content re-chunking)
- Replace CurlSession isinstance checks across manifests, tracks, DRM
- Update downloader with rnet native streaming path and byte-based progress tracking for accurate Rich progress bars
- Add speed display column to Rich progress bar (DASH/HLS/URL prefix)
- Add rnet dependency, services use exact preset names (e.g. OkHttp4_12)

2026-03-24 10:08:17 -06:00

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