Add private prayer petition signups to the mailing list

Your prayer petition form signups are missing from the mailing list, causing missed welcomes. Adds consenting submissions to your outreach list so petitioners receive messages same day.

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Overview

When petition signups don't reach your mailing list, outreach is inconsistent and community engagement drops. This flow ensures consenting petitioners are added to the outreach list automatically, so program coordinators can include them in welcome and follow-up messaging the same day.