Publish an event

1. A host owner creates the event: name, address, dates, venue, description. It is a draft that only its host, the host's members, and its event members can open; the cover is added when they edit it.
2. They build it in the dashboard: sessions, contributors, and organizations, each with tags that group them into sections such as Keynote, Speaker, Sponsor; ticket types; products; the badge design. Anything can stay hidden until it is final.
3. Owners add event members to this one event, as admin or staff, when outsiders help.
4. The owner publishes and chooses: a free event, up to the free cap; a full event, paying the base fee at Stripe Checkout, which saves the card; or the yearly plan. A host on the plan publishes at once.
5. The event page is public. As a full event grows, each time the ticket count crosses a block, the next block is charged to the saved card and Stripe emails a receipt.
6. Archiving hides the event and keeps everything. An event with sales cannot be deleted.

Rules: a product priced above zero means a full event. Every ticket ever issued counts, revoked ones included. When a free event reaches the cap, invites and walk-ins pause until the host upgrades; store orders and imports never pause. The base fee is the price on the day of publish, and a growth block is charged at the price of the day it is crossed. A fee is never refunded.