Fix SQL test task dependency to ensure SQL files are generated first

Changed shouldRunAfter to dependsOn for SQL test task to guarantee that SQL files
are generated before the test task runs, preventing test failures due to missing files.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: nakamura-to

codegen/src/main/java/org/seasar/doma/gradle/codegen/CodeGenPlugin.java

@@ -136,7 +136,7 @@ private void registerTasks(Project project, CodeGenConfig codeGenConfig) {
         task -> {
           task.setDescription("Generates SQL test source files.");
           task.setGroup(TASK_GROUP_NAME);
-          task.shouldRunAfter(sqlTask);
+          task.dependsOn(sqlTask);
           task.getOutputs().upToDateWhen(__ -> false);
           connectProperties(task, codeGenConfig);
         });