ask gpt editor-wait: last-resort tag-and-rescue when selector chain exhausted

ChatGPT renames #prompt-textarea / its testid faster than we can ship selector chain updates, which used to block all ask gpt commands at EDITOR-WAIT until user intervention. Fixed: after the 10s selector chain exhausts, WaitForChatGptEditorA11y performs a last-resort probe for any visible contenteditable/textbox/textarea, tags it with data-wkappbot-editor-rescue=1, and returns that selector so the ask flow continues. Diagnostic [ASK] EDITOR-DIAG dump still logged so suggest queue captures the new selector the next day.

Steps