test(log): expand handler, config, and metrics coverage

internal/config/config_test.go

@@ -0,0 +1,14 @@
+package config
+
+import "testing"
+
+func TestLoad_LogDSNOverride(t *testing.T) {
+	t.Setenv("EZ_LOG_PG_DSN", "host=log-db user=postgres dbname=logs")
+	cfg, err := Load()
+	if err != nil {
+		t.Fatalf("load config: %v", err)
+	}
+	if cfg.Log.DSN != "host=log-db user=postgres dbname=logs" {
+		t.Fatalf("expected log dsn to be set, got %q", cfg.Log.DSN)
+	}
+}