feat(dbml): support multiline table notes in DBML

* Add parsing for triple-quoted table notes in DBML
* Update writer to format multiline notes correctly
* Enhance tests for multiline table notes handling

pkg/readers/dbml/reader_test.go

@@ -1033,3 +1033,32 @@ func TestReader_ColumnPKOrderPreserved(t *testing.T) {
 		t.Errorf("expected snapshot_id (declared first) to have a lower Sequence than artifact_id, got %d >= %d", snapshotCol.Sequence, artifactCol.Sequence)
 	}
 }
+
+func TestReader_MultilineTableNote(t *testing.T) {
+	dbmlContent := "Table \"info\".\"city\" {\n" +
+		"  \"id_city\" serial [pk, not null, increment]\n" +
+		"  \"name\" text [not null]\n\n" +
+		"  Note: '''\n" +
+		"  Cities and municipalities worldwide.\n\n" +
+		"  SPATIAL:\n" +
+		"  Proximity queries use a GiST index.\n" +
+		"  '''\n" +
+		"}\n"
+	path := filepath.Join(t.TempDir(), "city.dbml")
+	if err := os.WriteFile(path, []byte(dbmlContent), 0o644); err != nil {
+		t.Fatalf("failed to write fixture: %v", err)
+	}
+
+	db, err := NewReader(&readers.ReaderOptions{FilePath: path}).ReadDatabase()
+	if err != nil {
+		t.Fatalf("ReadDatabase() error = %v", err)
+	}
+
+	table := db.Schemas[0].Tables[0]
+	if got, want := table.Description, "Cities and municipalities worldwide.\n\nSPATIAL:\nProximity queries use a GiST index."; got != want {
+		t.Errorf("table description = %q, want %q", got, want)
+	}
+	if got, want := len(table.Columns), 2; got != want {
+		t.Errorf("column count = %d, want %d; note body must not be parsed as columns", got, want)
+	}
+}