>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3538792. --> Reported by: [d34dman](https://www.drupal.org/user/751698) >>> <ul> <li>Create <code>FlowDropNodeProcessorManager</code> as an attribute-based plugin manager.</li> <li>Register all managers in <code>flowdrop.services.yml</code>.</li> <li>Ensure submodules have isolated service definitions to enforce SRP (Single Responsibility Principle).</li> </ul>