Add sticky round-robin for combos (#831)

Made-with: Cursor

src/sse/handlers/chat.js

@@ -97,14 +97,16 @@ export async function handleChat(request, clientRawRequest = null) {
     const comboSpecificStrategy = comboStrategies[modelStr]?.fallbackStrategy;
     const comboStrategy = comboSpecificStrategy || settings.comboStrategy || "fallback";
     
-    log.info("CHAT", `Combo "${modelStr}" with ${comboModels.length} models (strategy: ${comboStrategy})`);
+    const comboStickyLimit = settings.comboStickyRoundRobinLimit;
+    log.info("CHAT", `Combo "${modelStr}" with ${comboModels.length} models (strategy: ${comboStrategy}, sticky: ${comboStickyLimit})`);
     return handleComboChat({
       body,
       models: comboModels,
       handleSingleModel: (b, m) => handleSingleModelChat(b, m, clientRawRequest, request, apiKey),
       log,
       comboName: modelStr,
-      comboStrategy
+      comboStrategy,
+      comboStickyLimit
     });
   }
 
@@ -128,14 +130,16 @@ async function handleSingleModelChat(body, modelStr, clientRawRequest = null, re
       const comboSpecificStrategy = comboStrategies[modelStr]?.fallbackStrategy;
       const comboStrategy = comboSpecificStrategy || chatSettings.comboStrategy || "fallback";
       
-      log.info("CHAT", `Combo "${modelStr}" with ${comboModels.length} models (strategy: ${comboStrategy})`);
+      const comboStickyLimit = chatSettings.comboStickyRoundRobinLimit;
+      log.info("CHAT", `Combo "${modelStr}" with ${comboModels.length} models (strategy: ${comboStrategy}, sticky: ${comboStickyLimit})`);
       return handleComboChat({
         body,
         models: comboModels,
         handleSingleModel: (b, m) => handleSingleModelChat(b, m, clientRawRequest, request, apiKey),
         log,
         comboName: modelStr,
-        comboStrategy
+        comboStrategy,
+        comboStickyLimit
       });
     }
     log.warn("CHAT", "Invalid model format", { model: modelStr });