refactor(open-sse): registry consolidation + DRY media/oauth/adhoc cleanup

- Single-source registry: oauth clientId/tokenUrl, usage URLs, image/embed
  configs, search defaultModel, codex fixedPort, google token url derive.
- Remove 29 unused OmniRoute providers (registry 100→71); media intact.
- De-adhoc: codex literals → registry format/oauth flags; reasoningInject,
  image/embed openrouter headers + xai bodyFields config-driven.
- Add REGISTRY_TEMPLATE.js + expand PROVIDER_DEFAULTS/schema JSDoc.
- Baselines updated; PROVIDERS 62 + alias 90 byte-for-byte, golden snapshots.

Co-authored-by: Cursor <cursoragent@cursor.com>

open-sse/translator/request/claude-to-openai.js

@@ -56,8 +56,10 @@ export function claudeToOpenAIRequest(model, body, stream) {
     }
   }
 
-  // Fix missing tool responses - OpenAI requires every tool_call to have a response
-  fixMissingToolResponses(result.messages);
+  // Fix missing tool responses - OpenAI requires every tool_call to have a response.
+  // Local variant: scans contiguous tool replies + inserts "[No response received]"
+  // (distinct from the global immediate-next check in toolCallHelper, runs on the openai leg).
+  fixMissingToolResponsesOpenAI(result.messages);
 
   // Tools
   if (body.tools && Array.isArray(body.tools)) {
@@ -80,7 +82,7 @@ export function claudeToOpenAIRequest(model, body, stream) {
 }
 
 // Fix missing tool responses - add empty responses for tool_calls without responses
-function fixMissingToolResponses(messages) {
+function fixMissingToolResponsesOpenAI(messages) {
   for (let i = 0; i < messages.length; i++) {
     const msg = messages[i];
     if (msg.role === "assistant" && msg.tool_calls && msg.tool_calls.length > 0) {