feat: complete MQ-only dispatcher and OSS upload flow

internal/callruntime/runtime.go

@@ -62,10 +62,11 @@ type Config struct {
 }
 
 type RecordingFact struct {
-	Segment string
-	Path    string
-	SHA256  string
-	Bytes   int
+	Segment    string
+	Path       string
+	SHA256     string
+	Bytes      int // Complete file size, including the WAV header.
+	DurationMS int64
 }
 
 type Result struct {
@@ -385,7 +386,11 @@ func persistConversationRecordings(directory, channelID string, flowResult callf
 		if err := writeWAV(path, pcm, 16000); err != nil {
 			return inbound, nil, err
 		}
-		inbound = append(inbound, RecordingFact{Segment: fmt.Sprintf("inbound_turn_%02d", index+1), Path: path, SHA256: fileSHA256(path), Bytes: len(pcm)})
+		digest, size, err := fileDigestAndSize(path)
+		if err != nil {
+			return inbound, nil, fmt.Errorf("hash inbound recording: %w", err)
+		}
+		inbound = append(inbound, RecordingFact{Segment: fmt.Sprintf("inbound_turn_%02d", index+1), Path: path, SHA256: digest, Bytes: size, DurationMS: int64(len(pcm)) * 1000 / 32000})
 	}
 	outbound := make([]RecordingFact, 0, len(flowResult.OutboundTurns))
 	for index, pcm := range flowResult.OutboundTurns {
@@ -393,7 +398,11 @@ func persistConversationRecordings(directory, channelID string, flowResult callf
 		if err := writeWAV(path, pcm, 16000); err != nil {
 			return inbound, outbound, err
 		}
-		outbound = append(outbound, RecordingFact{Segment: fmt.Sprintf("outbound_segment_%02d", index), Path: path, SHA256: fileSHA256(path), Bytes: len(pcm)})
+		digest, size, err := fileDigestAndSize(path)
+		if err != nil {
+			return inbound, outbound, fmt.Errorf("hash outbound recording: %w", err)
+		}
+		outbound = append(outbound, RecordingFact{Segment: fmt.Sprintf("outbound_segment_%02d", index), Path: path, SHA256: digest, Bytes: size, DurationMS: int64(len(pcm)) * 1000 / 32000})
 	}
 	return inbound, outbound, nil
 }
@@ -423,11 +432,11 @@ func writeWAV(path string, pcm []byte, sampleRate int) error {
 	return os.WriteFile(path, buf, 0o600)
 }
 
-func fileSHA256(path string) string {
+func fileDigestAndSize(path string) (string, int, error) {
 	data, err := os.ReadFile(path)
 	if err != nil {
-		return ""
+		return "", 0, err
 	}
 	sum := sha256.Sum256(data)
-	return hex.EncodeToString(sum[:])
+	return hex.EncodeToString(sum[:]), len(data), nil
 }