The incorrect assumption that slugs were unique per-agent was made when
the subagent API was implemented. Whilst this PR doesn't completely
enforce that, we instead compute a stable hash to prefix the slug that
should provide a reasonable level of probability that the slug will be
unique.
Deletion of data is uncommon in our database, so the introduction of sub agents
and the deletion of them introduced issues with foreign key assumptions, as can
be seen in coder/internal#685. We could have only addressed the specific case by
allowing cascade deletion of stats as well as handling in the stats collector,
but it's unclear how many more such edge-cases we could run into.
In this change, we mark the rows as deleted via boolean instead, and filter them
out in all relevant queries.
Fixescoder/internal#685
Completely missed this in the original PR for adding support for
creating sub agents. This now allows specifying a list of display apps
to be added to the agent.
Closes https://github.com/coder/internal/issues/619
Implement the `coderd` side of the AgentAPI for the upcoming
dev-container agents work.
`agent/agenttest/client.go` is left unimplemented for a future PR
working to implement the agent side of this feature.
