v0.3.0

Fixed

• Disabled transparent gzip/brotli decoding for engine-managed downloads and now force Accept-Encoding: identity so HTTP progress tracks transferred wire bytes.
• Single-connection downloads now prefer the GET response length over HEAD, warn on mismatches, and fail early if streamed bytes exceed the expected total.
• WebSeed requests now use the same identity-encoding behavior so torrent-backed web downloads keep progress aligned with transferred bytes.