feat: implement logging interfaces and service logger

- Added Logger interface in core/interfaces/logger.go for standardized logging methods (Debugf, Infof, Warnf, Errorf).
- Introduced ServiceLogger in core/utils/log.go, which prefixes log messages with the service name for better context.
- Implemented logging methods in ServiceLogger to utilize the apex/log package for structured logging.

core/interfaces/logger.go

@@ -0,0 +1,16 @@
+package interfaces
+
+// Logger interface for reporting informational and warning messages.
+type Logger interface {
+	// Debugf logs a formatted debugging message.
+	Debugf(format string, args ...interface{})
+
+	// Infof logs a formatted informational message.
+	Infof(format string, args ...interface{})
+
+	// Warnf logs a formatted warning message.
+	Warnf(format string, args ...interface{})
+
+	// Errorf logs a formatted error message.
+	Errorf(format string, args ...interface{})
+}

core/utils/log.go

@@ -0,0 +1,42 @@
+package utils
+
+import (
+	"fmt"
+	"github.com/apex/log"
+)
+
+// ServiceLogger represents a logger with a specific service prefix.
+type ServiceLogger struct {
+	prefix string
+}
+
+// NewServiceLogger creates a new logger with the given service name as a prefix.
+func NewServiceLogger(serviceName string) *ServiceLogger {
+	return &ServiceLogger{
+		prefix: serviceName,
+	}
+}
+
+// Infof logs an informational message with formatted content.
+func (l *ServiceLogger) Infof(format string, args ...interface{}) {
+	log.Infof(l.getFormat(format), args...)
+}
+
+// Warnf logs a warning message with formatted content.
+func (l *ServiceLogger) Warnf(format string, args ...interface{}) {
+	log.Warnf(l.getFormat(format), args...)
+}
+
+// Errorf logs an error message with formatted content.
+func (l *ServiceLogger) Errorf(format string, args ...interface{}) {
+	log.Errorf(l.getFormat(format), args...)
+}
+
+// Debugf logs a debug message with formatted content.
+func (l *ServiceLogger) Debugf(format string, args ...interface{}) {
+	log.Debugf(l.getFormat(format), args...)
+}
+
+func (l *ServiceLogger) getFormat(format string) string {
+	return fmt.Sprintf("[%s] %s", l.prefix, format)
+}