onVercelProjectEnvironmentVariableDeleted emits when a project environment variable is deleted.
automations/audit-deleted-vercel-environment-variables.automation.ts
account defaults to the project’s Vercel OAuth binding.
Trigger data
Returns the environment-variable event shape, narrowed totype: "project.env-variable.deleted". payload.envVarId can be null after deletion, and Vercel never includes the variable value.