Add HD Agent Status records and make automatic ticket assignment skip unavailable agents

Add HD Agent Status records and make automatic ticket assignment skip unavailable agents: a task in bird-critic-1.5-full-300 (Harbor dataset). Frappe Helpdesk is customer support software built on Frappe. The codebase is at /workspace/repo . Services and dependencies are pre-installed.

The task

Frappe Helpdesk is customer support software built on Frappe. The codebase is at `/workspace/repo`. Services and dependencies are pre-installed.

Part of kochsnow/bird-critic-1.5-full-300.