Finalize guest boot and exec runtime updates

tests/test_runtime_boot_check.py

@@ -0,0 +1,21 @@
+from __future__ import annotations
+
+from pyro_mcp.runtime_boot_check import _classify_result
+
+
+def test_classify_result_reports_kernel_panic() -> None:
+    reason = _classify_result(
+        firecracker_log="Successfully started microvm",
+        serial_log="Kernel panic - not syncing: VFS: Unable to mount root fs",
+        vm_alive=False,
+    )
+    assert reason == "guest kernel panic during boot"
+
+
+def test_classify_result_reports_success_when_vm_stays_alive() -> None:
+    reason = _classify_result(
+        firecracker_log="Successfully started microvm",
+        serial_log="boot log",
+        vm_alive=True,
+    )
+    assert reason is None