feat: add agent zones

agents/windows/MinerOpsAgentService.ps1

@@ -78,6 +78,14 @@ function Send-AgentCheckin {
         local_time = (Get-Date).ToString("o")
     }
 
+    if (-not [string]::IsNullOrWhiteSpace([string]$config.site_id)) {
+        $body["site_id"] = [string]$config.site_id
+    }
+
+    if (-not [string]::IsNullOrWhiteSpace([string]$config.agent_zone_id)) {
+        $body["agent_zone_id"] = [string]$config.agent_zone_id
+    }
+
     return Invoke-AgentApi -Method "POST" -Path "/api/agent/checkin" -Body $body
 }
 

agents/windows/README.md

@@ -15,8 +15,11 @@ probe output are intentionally excluded.
 ## Local Files
 
 Create `agent-config.json` from `config.example.json` on the Agent host. Never
-commit that file. `site_id` is the durable MinerOps site UUID; `site_name` is
-retained only for transitional display compatibility.
+commit that file. `site_id` is the durable MinerOps site UUID. `agent_zone_id` is the optional
+durable network-reachability Zone UUID; older configurations may omit it only
+when the Hub can preserve an established assignment or resolve exactly one
+enabled Zone at the Site. `site_name` is retained only for transitional display
+compatibility.
 
 The Agent writes runtime state to `agent-state.json` and logs under `logs/`.
 Installation and upgrades preserve all three paths.

agents/windows/config.example.json

@@ -2,6 +2,7 @@
   "hub_url": "https://minerops.example.invalid",
   "agent_id": "replace-with-agent-id",
   "site_id": "00000000-0000-0000-0000-000000000000",
+  "agent_zone_id": "00000000-0000-0000-0000-000000000000",
   "site_name": "Example Site",
   "agent_secret": "replace-with-agent-secret",
   "poll_interval_seconds": 120,