chore(audio): retire EdgeTTS pending provenance review (#11711)

Merged via /merge-batch (v3.8.51 provenance sweep). Boarded and validated together with the batch's other provenance/retirement PRs in a combined worktree — full gate suite green, including the audio/speech-combo regression suites. Thank you.

src/app/api/v1/audio/speech/route.ts

@@ -18,7 +18,6 @@ import {
 import { attachOmniRouteMetaToResponse } from "@/domain/omnirouteResponseMeta";
 import { calculateModalCost } from "@/lib/usage/costCalculator";
 import { generateRequestId } from "@/shared/utils/requestId";
-import { getClientIpFromRequest } from "@/lib/ipUtils";
 
 /**
  * Handle CORS preflight
@@ -64,7 +63,7 @@ async function postHandler(request, context) {
     const combo = await getComboByName(body.model);
     if (combo) {
       const { executeSpeechCombo } = await import("@omniroute/open-sse/services/speechCombo");
-      return executeSpeechCombo(body.model, body, { request, policy }, startTime);
+      return executeSpeechCombo(body.model, body, startTime);
     }
   }
 
@@ -102,7 +101,6 @@ async function postHandler(request, context) {
     credentials,
     resolvedProvider: providerConfig,
     resolvedModel,
-    clientIp: getClientIpFromRequest(request),
   });
   if (response?.ok) {
     await clearRecoveredProviderState(credentials);