🔧 config: add log output file configuration and cleanup example files

pkg/config/config.go

@@ -34,6 +34,7 @@ type ShutdownConfig struct {
 type LoggingConfig struct {
 	JSON    bool   `mapstructure:"json"`
 	Level   string `mapstructure:"level"`
+	Output  string `mapstructure:"output"`
 }
 
 // TelemetryConfig holds OpenTelemetry-related configuration
@@ -67,6 +68,7 @@ func LoadConfig() (*Config, error) {
 	v.SetDefault("shutdown.timeout", 30*time.Second)
 	v.SetDefault("logging.json", false)
 	v.SetDefault("logging.level", "trace")
+	v.SetDefault("logging.output", "")
 
 	// Telemetry defaults
 	v.SetDefault("telemetry.enabled", false)
@@ -106,6 +108,7 @@ func LoadConfig() (*Config, error) {
 	v.BindEnv("shutdown.timeout", "DLC_SHUTDOWN_TIMEOUT")
 	v.BindEnv("logging.json", "DLC_LOGGING_JSON")
 	v.BindEnv("logging.level", "DLC_LOGGING_LEVEL")
+	v.BindEnv("logging.output", "DLC_LOGGING_OUTPUT")
 
 	// Telemetry environment variables
 	v.BindEnv("telemetry.enabled", "DLC_TELEMETRY_ENABLED")
@@ -139,6 +142,7 @@ func LoadConfig() (*Config, error) {
 		Dur("shutdown_timeout", config.Shutdown.Timeout).
 		Bool("logging_json", config.Logging.JSON).
 		Str("logging_level", config.Logging.Level).
+		Str("logging_output", config.Logging.Output).
 		Bool("telemetry_enabled", config.Telemetry.Enabled).
 		Str("telemetry_service", config.Telemetry.ServiceName).
 		Msg("Configuration loaded")
@@ -186,6 +190,11 @@ func (c *Config) GetLogLevel() string {
 	return c.Logging.Level
 }
 
+// GetLogOutput returns the log output path
+func (c *Config) GetLogOutput() string {
+	return c.Logging.Output
+}
+
 // SetupLogging configures zerolog based on the configuration
 func (c *Config) SetupLogging() {
 	// Parse log level