add initial application structure with configuration, logging, and health check endpoints

internal/repository/health_repo.go

@@ -0,0 +1,15 @@
+package repository
+
+import (
+	"epic-ent/internal/domain/vo"
+)
+
+type HealthRepository struct{}
+
+func NewHealthRepository() *HealthRepository {
+	return &HealthRepository{}
+}
+
+func (r *HealthRepository) Check() vo.HealthStatus {
+	return vo.HealthStatus{Status: "ok"}
+}