Tasks: Lifecycle executor uses task_auto_pause reason #1252

Repo: coder/coder

Scope: Modify lifecycle executor to use task-specific build reason when auto-stopping task workspaces.

Changes:

• Modify getNextTransition() in coderd/autobuild/lifecycle_executor.go
• Check if workspace has an associated task (join already present in query)
• Return database.BuildReasonTaskAutoPause instead of database.BuildReasonAutostop when eligible for autostop and workspace has a task
• Similar check needed for isEligibleForFailedStop (failed task workspaces should use task_auto_pause)

Files:

• coderd/autobuild/lifecycle_executor.go
• coderd/autobuild/lifecycle_executor_test.go

Acceptance criteria:

• Task workspaces stopped by lifecycle executor use task_auto_pause reason
• Regular workspaces continue using autostop reason
• Failed task workspaces use task_auto_pause when stopped
• Tests verify reason selection based on task presence

Dependencies:

• Tasks: Database migrations for task lifecycle #1250

References:

• PRD: Start/Pause/Resume the Task Workspace
• RFC: Tasks: Start/Pause/Resume Lifecycle: Approach (TTL Integration)