feat(stream): serve /stream from a debrid HTTPS link (hueco #2/2a)

The daemon can now stream a session straight from a server-resolved debrid
direct URL instead of disk/torrent, delivering the "play instantáneo
cache-fast" promise for cache-confirmed torrents the user never downloaded.

- debridFileProvider: an io.ReadSeekCloser over HTTP Range — network-free
  Seek, lazy GET on Read, reopen-on-seek, a HEAD up front for the size, and
  a URL-derived name so the served Content-Type is video/mp4 (not
  octet-stream) when the web's name lacks an extension.
- OnStreamSession branches on StreamSession.DirectURL before the filePath
  checks (no local path, no ffmpeg), builds the provider in a goroutine
  (HEAD off the sync loop) and marks the session ready.
- Bump 0.10.0 -> 0.11.0 as the debrid-stream floor the web gates on.

Validated e2e against a real AllDebrid account: a cached mp4 plays 1080p in
Chrome through the agent, including the high-offset seek for a non-faststart
file's moov atom. 2b (HLS-from-URL for mkv/HEVC) + 2c (cache-fast preference
+ mid-stream fallback) remain.

internal/cmd/version.go

@@ -1,4 +1,4 @@
 package cmd
 
 // Version is the CLI version. Overridden by goreleaser ldflags at release time.
-var Version = "0.10.0"
+var Version = "0.11.0"