AEM Assets Omnisearch — Cannot suppress auto-search on filter change + custom button injection into filter rail failing despite MutationObserver and multiple lifecycle hook attempts

In the AEM Assets Omnisearch UI, when a user opens the filter rail and selects any filter (file type, date range, tags, etc.), a search is automatically triggered on every single filter interaction. This causes: Multiple overlapping HTTP search requests fired in rapid succession Server-side query timeouts under normal DAM load UI freezing while waiting for responses Users unable to combine multiple filters before seeing results Required behavior: User selects multiple filters freely without any search firing A custom "Execute Search" button is visible in the filter rail Search only fires when the user explicitly clicks "Execute Search" This is a production workflow issue affecting all DAM users performing filtered asset searches.