Running outreach campaigns

Campaigns let you automate multi-step outreach sequences. A typical campaign:

1. Send a connection invitation with a personalized note. 2. Wait for acceptance. 3. Send a follow-up message after a delay. 4. Send additional follow-ups based on responses.

Use 'upsert_campaign' to set up the sequence, then add leads from a list or search results. Crispy automatically staggers sends to look natural.