Refactor logging

internal/config/config.go

@@ -10,12 +10,24 @@ import (
 type Config struct {
 	Server   ServerConfig   `yaml:"server"`
 	Database DatabaseConfig `yaml:"database"`
+	Logging  LoggingConfig  `yaml:"logging"`
+	Metrics  MetricsConfig  `yaml:"metrics"`
 }
 
 type ServerConfig struct {
 	Port int `yaml:"port"`
 }
 
+type LoggingConfig struct {
+	Level  string `yaml:"level"`
+	Format string `yaml:"format"` // "json" or "console"
+}
+
+type MetricsConfig struct {
+	Enabled bool `yaml:"enabled"`
+	Port    int  `yaml:"port"`
+}
+
 type DatabaseConfig struct {
 	Host     string `yaml:"host"`
 	Port     int    `yaml:"port"`
@@ -35,6 +47,14 @@ func Load(path string) (*Config, error) {
 			Port:    5432,
 			SSLMode: "disable",
 		},
+		Logging: LoggingConfig{
+			Level:  "info",
+			Format: "json",
+		},
+		Metrics: MetricsConfig{
+			Enabled: true,
+			Port:    9090,
+		},
 	}
 
 	if path == "" {