onFormResponseSubmitted watches one form and emits every newly submitted
response version. Google treats respondent edits as submissions too.
Example
Options
form: string is required and accepts a static ID or standard Forms URL.
account is an optional static Google account binding. Signals cannot choose
the watched form or account at runtime.
Trigger data
Returns a normalizedFormResponse; see Get form response.
Automate.ax establishes its response cursor when the watch is created, so it
does not intentionally replay older responses. It pages through all responses
represented by a notification and deduplicates each response version by
responseId plus lastSubmittedTime.