Allow a sender to suppress the per-envelope invite email

Shipped

6 ஆகஸ்ட், 2026 அன்று 12:35 PM UTC

Author

Kamo

Commit

e198831

Creating an envelope unconditionally emailed an invite, so a caller batching many envelopes behind one notification had no way to stay quiet. Null preserves the existing behaviour; the access token is still issued either way.