* Add support to set `created_at`
Discussed in
https://github.com/basecamp/fizzy/pull/1766#issuecomment-3637846074,
this allows users to import cards from another system with entries from
the past. For instance I'm importing all our Github issues (including
the closed onces) to Fizzy.
* Iron out published state tracking
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Co-authored-by: Jeremy Daer <jeremy@37signals.com>
Jankees van Woezik
477b4d65f2