Fix upgrade test bool literal for Postgres

Use `true` instead of `1` for BOOLEAN column insert in
TestUpgrade_SchemaMultiColumnAdd. Postgres BOOLEAN rejects integer
literals; `true` works on both PG and SQLite.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

server/handlers/upgrade_test.go

@@ -236,8 +236,9 @@ func TestUpgrade_SchemaMultiColumnAdd(t *testing.T) {
 	}
 
 	// Verify new row can use all columns
+	// Use 'true' for bool — works on both Postgres (BOOLEAN) and SQLite (INTEGER, coerced to 1)
 	_, err = database.TestDB.ExecContext(ctx,
-		fmt.Sprintf("INSERT INTO %s (id, name, priority, score, active) VALUES ('r2', 'new', 3, 4.5, 1)", physical))
+		fmt.Sprintf("INSERT INTO %s (id, name, priority, score, active) VALUES ('r2', 'new', 3, 4.5, true)", physical))
 	if err != nil {
 		t.Fatal("insert with new columns failed:", err)
 	}