groove-utilities-task-doctor Outcome All task backend health checks pass. User knows if the task backend is correctly configured, installed, and reachable. Acceptance Criteria - Each check is reported with ✓ or ✗ - Each failure includes a specific remediation command - Checks cover config, CLI installation, and reachability Checks (run in order) 1. exists at git root 2. key is present and has a valid value ( , , , or ) 3. If — report no-op and exit (all green) 4. Backend CLI is installed: - : - : - : 5. Backend-specific config file exists: - : at git root - : auth token configured - : 6. Back…