CLDSRV-810: Use rate limiting config in token bucket class

Author: anurag4DSB

lib/api/apiUtils/rateLimit/tokenBucket.js

@@ -29,8 +29,8 @@ class WorkerTokenBucket {
         this.log = log;
 
         // Token buffer configuration
-        this.bufferSize = config.tokenBucketBufferSize || 50; // Max tokens to hold
-        this.refillThreshold = config.tokenBucketRefillThreshold || 20; // Trigger refill when below this
+        this.bufferSize = config.rateLimiting?.tokenBucketBufferSize || 50; // Max tokens to hold
+        this.refillThreshold = config.rateLimiting?.tokenBucketRefillThreshold || 20; // Trigger refill when below this
         this.tokens = this.bufferSize; // Start with full buffer for fail-open at startup
 
         // Refill state