feat: add agent zones

backend/tests/test_agent_commands.py

@@ -199,6 +199,8 @@ class AgentSourceContractTests(unittest.TestCase):
         self.assertNotIn('DefaultValue "super"', service)
         self.assertNotIn('DefaultValue "super"', powershell)
         self.assertIn('"X-MinerOps-Agent-ID"', service)
+        self.assertIn('.agent_zone_id', service)
+        self.assertIn('"agent_zone_id"', (root / "config.example.json").read_text())
         self.assertNotIn("?agent_id=", service)
         self.assertIn('"get.miner.setting"', control)
         self.assertIn("$attempt -le 3", control)