Add MonitorAlbumStream bidirectional streaming RPC with automatic and manual interaction modes

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

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

internal/server.go

@@ -7,6 +7,8 @@ import (
 	"github.com/riverqueue/river"
 	"github.com/rs/zerolog/log"
 	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/status"
 
 	pb "homelab.lan/music-agregator/gen/music_agregator/v1"
 	"homelab.lan/music-agregator/internal/config"
@@ -46,6 +48,29 @@ func (s *MusicAgregatorServer) MonitorAlbum(ctx context.Context, req *pb.Monitor
 	return s.service.MonitorAlbum(ctx, req)
 }
 
+func (s *MusicAgregatorServer) MonitorAlbumStream(stream pb.MusicAgregatorService_MonitorAlbumStreamServer) error {
+	msg, err := stream.Recv()
+	if err != nil {
+		return err
+	}
+
+	startReq := msg.GetStart()
+	if startReq == nil {
+		return status.Error(codes.InvalidArgument, "first message must be StartMonitorRequest")
+	}
+
+	ctx, cancel := context.WithCancel(stream.Context())
+	defer cancel()
+
+	workflow := newMonitorWorkflow(stream, startReq, s.service, cancel)
+
+	if startReq.Mode == pb.InteractionMode_INTERACTION_MODE_MANUAL {
+		go workflow.receiveDecisions(ctx)
+	}
+
+	return workflow.run(ctx)
+}
+
 func (s *MusicAgregatorServer) AnalyzeAlbumRelease(ctx context.Context, req *pb.AnalyzeAlbumReleaseRequest) (*pb.AnalyzeAlbumReleaseResponse, error) {
 	return s.service.AnalyzeAlbumRelease(ctx, req)
 }