* Improves logic for `exp task status --watch` so that it will also exit
on task idle status.
* Adds workspace agent health to `exp task status` output.
This changes the task get endpoint to omit app statuses for previous
'lifetimes' of a workspace.
It also introduces a [breaking
change](https://github.com/coder/coder/blob/release/2.26/codersdk/aitasks.go#L83)
to bring `TaskStateComplete` in line with
`WorkspaceAppStatusStateComplete`. I can alternatively revert this
change and add a conversion function between the two SDK types.
Refactors `codersdk.Client`'s use of session tokens to use a `SessionTokenProvider`, which abstracts the obtaining and storing of the session token.
The main motiviation is to unify Agent authentication an an upstack PR, which can use cloud instance identity via token exchange, rather than a fixed session token.
However, the abstraction could also allow functionality like obtaining the session token from other external sources like the OS credential manager, or an external secret/key management system like Vault.
Closes https://github.com/coder/internal/issues/949
Adds the following fields to `codersdk.Task`
- OwnerName
- TemplateName
- TemplateDisplayName
- TemplateIcon
- WorkspaceAgentID
- WorkspaceAgentLifecycle
- WorkspaceAgentHealth
The implementation is unfortunately not compatible with multiple agents
as we have no reliable way to tell which agent has the AI task running
in it. For now we just pick the first agent found, but in the future
this will need to be changed.