- Updated markAccountUnavailable function to accept resetsAtMs for precise cooldown management.

- Added email backfill functionality for Codex OAuth connections to improve account information accuracy.

src/sse/handlers/chat.js

@@ -224,8 +224,8 @@ async function handleSingleModelChat(body, modelStr, clientRawRequest = null, re
 
     if (result.success) return result.response;
 
-    // Mark account unavailable (auto-calculates cooldown with exponential backoff)
-    const { shouldFallback } = await markAccountUnavailable(credentials.connectionId, result.status, result.error, provider, model);
+    // Mark account unavailable (auto-calculates cooldown with exponential backoff, or precise resetsAtMs)
+    const { shouldFallback } = await markAccountUnavailable(credentials.connectionId, result.status, result.error, provider, model, result.resetsAtMs);
 
     if (shouldFallback) {
       log.warn("AUTH", `Account ${credentials.connectionName} unavailable (${result.status}), trying fallback`);