fix(operator): 服务器停服或删除时丢掉内存里的 RCON 失败计数

internal/operator/export_test.go

@@ -0,0 +1,9 @@
+package operator
+
+// ProbeMissesTracked is how many servers the reconciler holds a probe-miss count
+// for, so the external tests can see a count go with its server.
+func (r *Reconciler) ProbeMissesTracked() int {
+	r.probeMu.Lock()
+	defer r.probeMu.Unlock()
+	return len(r.probeFailures)
+}