upstreamErrorResponse (utils/audioResponse.ts)

Generates sanitized CORS error responses for upstream failures in audio/speech endpoints.

// Source: https://github.com/diegosouzapw/OmniRoute | License: MIT | Copyright 2026 diegosouzapw
// Provided via justclaw.it.com; keep this notice with the code.
/**
 * Shared audio/speech HTTP response helpers.
 *
 * Extracted from `open-sse/handlers/audioSpeech.ts` so that both the handler
 * and any provider-specific adapter modules extracted alongside it (e.g.
 * `open-sse/executors/awsPollyTts.ts`) can share the same response-shaping
 * logic without importing from the (frozen, file-size-ratcheted) handler
 * itself — which would create a circular import.
 */
import { CORS_HEADERS } from "./cors.ts";
import { errorResponse } from "./error.ts";
import { sanitizeErrorMessage } from "./errorSanitization.ts";

/**
 * Pull a human-readable error message out of a parsed upstream JSON error

... (truncated -- full source via MCP)