refactor(obs): migrate metrics runtime/schema and tighten migration guards (#2584)

crates/io-metrics/src/sampler/system.rs

@@ -0,0 +1,21 @@
+// Copyright 2024 RustFS Team
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+use crate::ProcessPlatformSnapshot;
+
+/// Collect process platform-specific I/O and virtual memory counters.
+#[inline]
+pub fn snapshot_process_platform() -> ProcessPlatformSnapshot {
+    crate::snapshot_process_platform_stats()
+}