Enhance resilience: add jitter and status fetch retries to handle bursts

src/duckai.ts

@@ -84,6 +84,9 @@ export class DuckAI {
     
     console.log(`[${reqId}] [Chat] NEW REQUEST. Parallel active: ${activeRequests}`);
 
+    // Добавляем Jitter (случайную задержку 0-500мс), чтобы не долбить DDG пачкой
+    await new Promise(r => setTimeout(resolve => r(resolve), Math.random() * 500));
+
     const userAgent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36';
     const headers = {
         "User-Agent": userAgent,
@@ -93,11 +96,27 @@ export class DuckAI {
     };
 
     try {
-        console.log(`[${reqId}] [Chat] Fetching status...`);
-        const statusRes = await fetch("https://duckduckgo.com/duckchat/v1/status?q=1", { headers });
-        const hashHeader = statusRes.headers.get("x-vqd-hash-1");
+        let hashHeader = null;
+        let statusAttempt = 0;
+        
+        // Ретрай для получения статуса (VQD)
+        while (!hashHeader && statusAttempt < 3) {
+            console.log(`[${reqId}] [Chat] Fetching status (Attempt ${statusAttempt + 1})...`);
+            const statusRes = await fetch("https://duckduckgo.com/duckchat/v1/status?q=1", { headers });
+            hashHeader = statusRes.headers.get("x-vqd-hash-1");
+            
+            if (!hashHeader) {
+                if (statusRes.status === 429) {
+                    console.log(`[${reqId}] [Chat] Status 429 detected. Waiting...`);
+                    await new Promise(r => setTimeout(resolve => r(resolve), 1000 * (statusAttempt + 1)));
+                } else {
+                    throw new Error(`Status ${statusRes.status}: Missing VQD hash`);
+                }
+            }
+            statusAttempt++;
+        }
         
-        if (!hashHeader) throw new Error(`Status ${statusRes.status}: Missing VQD hash`);
+        if (!hashHeader) throw new Error("Failed to obtain VQD hash after retries");
 
         const solvedVqd = await this.solveChallenge(hashHeader, reqId);