Notifications and emails showed the acting user's auto-generated
username instead of their display Name.
The doer attached to notification events was built straight from the
JWT via user.GetFromAuth, which only carries id + username (Name is
never set in GetUserFromClaims). Notifications render n.Doer.GetName(),
which falls back to the username when Name is empty, so every "assigned
you", "mentioned you", task-deleted, project-created and team-member
notification rendered the username.
Resolve the full user from the database at the event-producing dispatch
sites. doerFromAuth now re-fetches the user (with Name) and is reused by
all the notification doers; account-status errors are swallowed so flows
acting on behalf of disabled accounts (e.g. user deletion deleting that
user's tasks) keep working while still carrying the display name.
Fixes#2720
GetUserOrLinkShareUser re-fetches the account and fails its status
check, which broke deleting a disabled user's projects (the deletion
runs with the disabled account as doer). Convert the authenticated
principal directly instead — it also matches what the events serialized
before the doer became concrete, and drops a query per event.
ProjectUpdated/Deleted, ProjectSharedWith* and TeamCreated/Deleted
carried an interface-typed Doer that could not be unmarshaled, forcing
the audit registrations to decode anonymous mirror structs. Hydrate the
doer via GetUserOrLinkShareUser at the dispatch sites like the task
events already do, register the events directly and drop the untyped
audit registration path.
Webhook payloads for these events now serialize link share doers as
their pseudo-user (negative id) instead of the raw link share object,
consistent with task events.