refactor: Remove default configuration constants and simplify config parsing

config/config.go

@@ -18,15 +18,6 @@ const (
 	EnvResponseTimeout = "RESPONSE_TIMEOUT"
 )
 
-// Default configuration values
-const (
-	DefaultLogLevel        = zerolog.InfoLevel
-	DefaultNumWorkers      = 5
-	DefaultWorkerBatchSize = 100
-	DefaultMaxResponseSize = 1048576 // 1MB
-	DefaultResponseTimeout = 30      // seconds
-)
-
 // Config holds the application configuration loaded from environment variables
 type Config struct {
 	LogLevel        zerolog.Level // Logging level (debug, info, warn, error)
@@ -34,7 +25,7 @@ type Config struct {
 	MaxResponseSize int           // Maximum size of response in bytes
 	NumOfWorkers    int           // Number of concurrent workers
 	ResponseTimeout int           // Timeout for responses in seconds
-	WorkerBatchSize int          // Batch size for worker processing
+	WorkerBatchSize int           // Batch size for worker processing
 }
 
 // String returns a string representation of the configuration