Add metrics shipper and initial test

agent/shipper.py

@@ -0,0 +1,7 @@
+"""Ships collected metrics to the internal dashboard."""
+
+import requests
+
+
+def ship(metrics, endpoint="https://metrics.holtrix-devtools.internal/ingest"):
+    return requests.post(endpoint, json=metrics, timeout=5)

tests/test_collector.py

@@ -0,0 +1,5 @@
+from agent.collector import collect
+
+
+def test_collect_defaults():
+    assert collect() == {"builds": 0, "deploys": 0}