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
@@ -62,7 +53,7 @@ func parsePositiveInt(value string) (int, error) {
 // GetConfig loads and validates configuration from environment variables
 func GetConfig() *Config {
 	config := &Config{}
-	
+
 	// Map of environment variables to their parsing functions
 	parsers := map[string]func(string) error{
 		EnvLogLevel: func(v string) error {
@@ -121,7 +112,7 @@ func GetConfig() *Config {
 			fmt.Fprintf(os.Stderr, "Missing required environment variable: %s\n", envVar)
 			os.Exit(1)
 		}
-		
+
 		if err := parser(value); err != nil {
 			fmt.Fprintf(os.Stderr, "Configuration error: %v\n", err)
 			os.Exit(1)