v2.1.3: Pipe resilience — retry logic, caching, optimized streaming

- Added pipeRequest() with retry + exponential backoff (3 attempts)
- Cached episodes (5min) and sources (10min) responses
- Confirmed kiwi/bonk CDNs serve real content, bee/ally serve decoys
- Updated version to 2.1.3 across package.json, health, OpenAPI

src/routes/apiRoutes.js

@@ -1102,7 +1102,7 @@ const createApiRoutes = (jsonResponse, jsonError, startTime) => {
       success: true,
       results: {
         status: "healthy",
-        version: "2.1.0",
+        version: "2.1.3",
         uptime: `${hours}h ${minutes}m ${seconds}s`,
         uptimeSeconds: uptime,
         timestamp: new Date().toISOString(),
@@ -1157,7 +1157,7 @@ const createApiRoutes = (jsonResponse, jsonError, startTime) => {
       info: {
         title: "MiruroAPI",
         description: "Free REST API for anime streaming data — AniList GraphQL + Miruro streaming providers",
-        version: "2.1.0",
+        version: "2.1.3",
         contact: { name: "Shineii86", url: "https://github.com/Shineii86/MiruroAPI" },
       },
       servers: [