Method handleStreamFailure

src/node/services/streamManager.ts:3064–3081

* Persist error state and emit error events for failed streams.

(
    workspaceId: WorkspaceId,
    streamInfo: WorkspaceStreamInfo,
    error: unknown
  )

   * Persist error state and emit error events for failed streams.
   */
  private async handleStreamFailure(
    workspaceId: WorkspaceId,
    streamInfo: WorkspaceStreamInfo,
    error: unknown
  ): Promise<void> {
    streamInfo.state = StreamState.ERROR;

    const workspaceLog = this.getWorkspaceLogger(workspaceId, streamInfo);

    // Log the actual error for debugging
    workspaceLog.error("Stream processing error:", error);

    // Record lost previousResponseId so future requests can filter it out
    this.recordLostResponseIdIfApplicable(workspaceId, error, streamInfo, workspaceLog);

    const errorPayload = this.buildStreamErrorPayload(streamInfo, error);
    await this.persistStreamError(workspaceId, streamInfo, errorPayload);
  }

  private buildStreamErrorPayload(
    streamInfo: WorkspaceStreamInfo,