Add album/track releases with audio analysis, AnalyzeAlbumRelease RPC, Docker path auto-resolution, release parsing decision tree

internal/audio/analyzer.go

@@ -0,0 +1,35 @@
+package audio
+
+import (
+	"fmt"
+	"path/filepath"
+	"strings"
+)
+
+type TrackInfo struct {
+	Format      string
+	BitDepth    int
+	SampleRate  int
+	Channels    int
+	DurationMs  int
+	BitrateKbps int
+	IsLossless  bool
+}
+
+func Analyze(filePath string) (*TrackInfo, error) {
+	ext := strings.ToLower(filepath.Ext(filePath))
+
+	switch ext {
+	case ".flac":
+		return analyzeFLAC(filePath)
+	case ".mp3":
+		return analyzeMP3(filePath)
+	case ".aac", ".m4a", ".ogg", ".wav", ".ape", ".wv", ".alac":
+		return &TrackInfo{
+			Format:     strings.ToUpper(strings.TrimPrefix(ext, ".")),
+			IsLossless: ext == ".wav" || ext == ".ape" || ext == ".wv" || ext == ".alac",
+		}, nil
+	default:
+		return nil, fmt.Errorf("unsupported audio format: %s", ext)
+	}
+}