feat: add localized ledger explorer dashboard

infrastructure/postgres/migration_test.go

@@ -25,3 +25,16 @@ func TestInitialMigrationContainsLedgerSafetyGuards(t *testing.T) {
 		}
 	}
 }
+
+func TestExplorerFilterMigrationAddsSupportingIndexes(t *testing.T) {
+	contents, err := migrationFiles.ReadFile("migrations/000002_explorer_filters.up.sql")
+	if err != nil {
+		t.Fatal(err)
+	}
+	schema := string(contents)
+	for _, required := range []string{"journals_effect_recorded_idx", "lower(effect_kind)", "ledger_accounts_user_owner_idx", "USER_AVAILABLE", "USER_FROZEN"} {
+		if !strings.Contains(schema, required) {
+			t.Fatalf("explorer filter migration is missing %q", required)
+		}
+	}
+}