DefaultAcquireJobLongPollDur is the time the (deprecated) AcquireJob rpc waits to try to obtain a job before canceling and returning an empty job.

DefaultHeartbeatInterval is the interval at which the provisioner daemon will update its last seen at timestamp in the database.

Acquirer is shared among multiple routines that need to call database.Store.AcquireProvisionerJob.

TemplateVersionDryRunJob is the payload for the "template_version_dry_run" job type.

WorkspaceProvisionJob is the payload for the "workspace_provision" job type.

AcquirerStore is the subset of database.Store that the Acquirer needs.