Prefer torrents with real seeders: resolve connected seeder count from swarm during magnet resolution

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/claude-agent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

internal/tracker/magnet.go

@@ -11,8 +11,13 @@ import (
 	"github.com/rs/zerolog/log"
 )
 
+type ResolveResult struct {
+	Data             []byte
+	ConnectedSeeders int
+}
+
 type Resolver interface {
-	Resolve(magnetURI string) ([]byte, error)
+	Resolve(magnetURI string) (*ResolveResult, error)
 }
 
 type MagnetResolver struct {
@@ -41,7 +46,7 @@ func NewMagnetResolver(timeout time.Duration) (*MagnetResolver, error) {
 	}, nil
 }
 
-func (r *MagnetResolver) Resolve(magnetURI string) ([]byte, error) {
+func (r *MagnetResolver) Resolve(magnetURI string) (*ResolveResult, error) {
 	truncated := magnetURI
 	if len(truncated) > 80 {
 		truncated = truncated[:80] + "..."
@@ -104,11 +109,14 @@ func (r *MagnetResolver) Resolve(magnetURI string) ([]byte, error) {
 	}
 resolved:
 
+	stats := t.Stats()
 	info := t.Info()
 	log.Debug().
 		Str("name", info.Name).
 		Int("files", len(info.Files)).
 		Int64("size", info.TotalLength()).
+		Int("connected_seeders", stats.ConnectedSeeders).
+		Int("active_peers", stats.ActivePeers).
 		Msg("magnet resolved")
 
 	mi := t.Metainfo()
@@ -121,7 +129,10 @@ resolved:
 		return nil, fmt.Errorf("marshaling torrent data: %w", err)
 	}
 
-	return data, nil
+	return &ResolveResult{
+		Data:             data,
+		ConnectedSeeders: stats.ConnectedSeeders,
+	}, nil
 }
 
 func (r *MagnetResolver) Close() {