geo ip 데이터 load후 api 수행하도록 구조 변경

internal/geo/resolver_postgres_test.go

@@ -0,0 +1,30 @@
+package geo
+
+import (
+	"os"
+	"testing"
+)
+
+func TestPostgresResolverLookup(t *testing.T) {
+	dsn := os.Getenv("GEOIP_TEST_DATABASE_URL")
+	if dsn == "" {
+		t.Skip("GEOIP_TEST_DATABASE_URL not set; skipping Postgres integration test")
+	}
+
+	resolver, err := NewResolver(Config{
+		Backend:     BackendPostgres,
+		DatabaseURL: dsn,
+	})
+	if err != nil {
+		t.Fatalf("failed to init postgres resolver: %v", err)
+	}
+	defer resolver.Close()
+
+	loc, err := resolver.Lookup("1.1.1.1")
+	if err != nil {
+		t.Fatalf("lookup failed: %v", err)
+	}
+	if loc.IP == "" {
+		t.Fatalf("expected resolved IP, got empty")
+	}
+}