feat: integrate global metrics system into AHM scanner

- Add global metrics system to common crate for cross-module usage
- Integrate global metrics collection into AHM scanner operations
- Update ECStore to use common metrics system instead of local implementation
- Add chrono dependency to AHM crate for timestamp handling
- Re-export IlmAction from common metrics in ECStore lifecycle module
- Update scanner methods to use global metrics for cycle, disk, and volume scans
- Maintain backward compatibility with local metrics collector
- Fix clippy warnings and ensure proper code formatting

This change enables unified metrics collection across the entire RustFS system,
allowing better monitoring and observability of scanner operations.

Signed-off-by: junxiang Mu <1948535941@qq.com>

Cargo.lock

@@ -7930,6 +7930,7 @@ dependencies = [
  "anyhow",
  "async-trait",
  "bytes",
+ "chrono",
  "futures",
  "lazy_static",
  "rmp-serde",
@@ -7965,6 +7966,8 @@ dependencies = [
 name = "rustfs-common"
 version = "0.0.5"
 dependencies = [
+ "chrono",
+ "rustfs-madmin",
  "tokio",
  "tonic",
  "uuid",