fix(providers): admit audio-speech/audio-transcriptions apiType in audio route provider-node filters (#9096)

Closes #9096
Refs: base-red #9737
fix/9096-audio-speech-transcriptions-

changelog.d/fixes/9096-fix-audio-speech-transcriptions-translations-provider-nodes.plan.md

@@ -0,0 +1 @@
+- fix(providers): admit audio-speech/audio-transcriptions apiType in audio route provider-node filters (#9096)

tests/unit/audio-speech-dynamic-node-9096.test.ts

@@ -0,0 +1,67 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+
+const { parseSpeechModel, parseTranscriptionModel, parseTranslationModel } = await import("../../open-sse/config/audioRegistry.ts");
+
+test("parseSpeechModel resolves dynamic provider (audio-speech apiType) by prefix", () => {
+  const dynamicProviders = [
+    {
+      id: "mytest9096",
+      baseUrl: "http://localhost:9999/v1/audio/speech",
+      authType: "none" as const,
+      authHeader: "none" as const,
+      models: [],
+    },
+  ];
+
+  const result = parseSpeechModel("mytest9096/tts-1", dynamicProviders);
+  assert.equal(result.provider, "mytest9096");
+  assert.equal(result.model, "tts-1");
+});
+
+test("parseSpeechModel returns null for unknown dynamic provider prefix", () => {
+  const dynamicProviders = [
+    {
+      id: "mytest9096",
+      baseUrl: "http://localhost:9999/v1/audio/speech",
+      authType: "none" as const,
+      authHeader: "none" as const,
+      models: [],
+    },
+  ];
+
+  const result = parseSpeechModel("nonexistent/tts-1", dynamicProviders);
+  assert.equal(result.provider, null);
+});
+
+test("parseTranscriptionModel resolves dynamic provider (audio-transcriptions apiType) by prefix", () => {
+  const dynamicProviders = [
+    {
+      id: "mytest9096",
+      baseUrl: "http://localhost:9999/v1/audio/transcriptions",
+      authType: "none" as const,
+      authHeader: "none" as const,
+      models: [],
+    },
+  ];
+
+  const result = parseTranscriptionModel("mytest9096/whisper-1", dynamicProviders);
+  assert.equal(result.provider, "mytest9096");
+  assert.equal(result.model, "whisper-1");
+});
+
+test("parseTranslationModel resolves dynamic provider (audio-transcriptions apiType) by prefix", () => {
+  const dynamicProviders = [
+    {
+      id: "mytest9096",
+      baseUrl: "http://localhost:9999/v1/audio/translations",
+      authType: "none" as const,
+      authHeader: "none" as const,
+      models: [],
+    },
+  ];
+
+  const result = parseTranslationModel("mytest9096/whisper-1", dynamicProviders);
+  assert.equal(result.provider, "mytest9096");
+  assert.equal(result.model, "whisper-1");
+});