* chore(release): add v1.0.9 changelog, customer email, and thumbnail artifacts
* chore(release): rewrite v1.0.9 customer email as a webhook announcement
* chore(release): tighten v1.0.9 email around what people asked for
* chore(release): rewrite v1.0.9 email around webhook value
* chore(release): write a plain v1.0.9 webhook announcement email
* chore(release): close v1.0.9 email with a G2 review ask
