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)

pyproject.toml

@@ -36,7 +36,6 @@ dependencies = [
     "jsonpickle>=3.0.4,<5",
     "langcodes>=3.4.0,<4",
     "lxml>=5.2.1,<7",
-    "pproxy>=2.7.9,<3",
     "protobuf>=4.25.3,<7",
     "pycaption>=2.2.6,<3",
     "pycryptodomex>=3.20.0,<4",
@@ -55,9 +54,7 @@ dependencies = [
     "Unidecode>=1.3.8,<2",
     "urllib3>=2.6.3,<3",
     "chardet>=5.2.0,<6",
-    "curl-cffi>=0.7.0b4,<0.14",
     "pyplayready>=0.8.3,<0.9",
-    "httpx>=0.28.1,<0.29",
     "cryptography>=45.0.0,<47",
     "subby",
     "aiohttp>=3.13.3,<4",
@@ -68,6 +65,7 @@ dependencies = [
     "language-data>=1.4.0",
     "wasmtime>=41.0.0",
     "animeapi-py>=0.6.0",
+    "rnet>=2.4.2",
 ]
 
 [project.urls]