Fix LadybugDB schema conflicts by dropping tables before recreation

Author: h4xr

src/main/java/com/neuvem/java2graph/passes/ExportPass.java

@@ -107,7 +107,14 @@ private void exportLadybug(Path dbPath, GraphContext context) {
         try (Database db = new Database(dbPath.toString());
              Connection conn = new Connection(db)) {
 
-            // Schema
+            // Schema - Drop relationship tables first due to dependencies
+            executeOrThrow(conn, "DROP TABLE IF EXISTS Extends");
+            executeOrThrow(conn, "DROP TABLE IF EXISTS Implements");
+            executeOrThrow(conn, "DROP TABLE IF EXISTS Defines");
+            executeOrThrow(conn, "DROP TABLE IF EXISTS Calls");
+            executeOrThrow(conn, "DROP TABLE IF EXISTS Class");
+            executeOrThrow(conn, "DROP TABLE IF EXISTS Method");
+
             executeOrThrow(conn, "CREATE NODE TABLE Class(id STRING, fqn STRING, name STRING, isInterface BOOLEAN, declarationCode STRING, PRIMARY KEY (id))");
             executeOrThrow(conn, "CREATE NODE TABLE Method(id STRING, fqn STRING, name STRING, signature STRING, sourceCode STRING, isLambda BOOLEAN, PRIMARY KEY (id))");