Scanner (#156)

* feat: integrate CancellationToken for unified background services management

- Consolidate data scanner and auto heal cancellation tokens into single unified token
- Move GLOBAL_BACKGROUND_SERVICES_CANCEL_TOKEN to global.rs for centralized management
- Add graceful shutdown support to MRF heal routine with MinIO-compatible logic
- Implement heal_routine_with_cancel method preserving original healing logic
- Update main.rs to use unified background services shutdown mechanism
- Enhance error handling with proper ecstore Result types
- Fix clippy warnings for needless return statements
- Maintain backward compatibility while adding modern cancellation support

This change provides a cleaner architecture for background service lifecycle management
and ensures all healing services can be gracefully shut down through a single token.

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

* fix: Refact heal and scanner design

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

* refact: step 2

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

* feat: refactor scanner module and add data usage statistics

- Move scanner code to scanner/ subdirectory for better organization
- Add data usage statistics collection and persistence
- Implement histogram support for size and version distribution
- Add global cancel token management for scanner operations
- Integrate scanner with ECStore for comprehensive data analysis
- Update error handling and improve test isolation
- Add data usage API endpoints and backend integration

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

* Chore: fix ref and fix comment

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

* fix: fix clippy

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

---------

Signed-off-by: junxiang Mu <1948535941@qq.com>
Co-authored-by: dandan <dandan@dandandeMac-Studio.local>

Cargo.lock

@@ -7857,6 +7857,7 @@ dependencies = [
  "pin-project-lite",
  "reqwest",
  "rust-embed",
+ "rustfs-ahm",
  "rustfs-appauth",
  "rustfs-common",
  "rustfs-config",
@@ -7897,6 +7898,34 @@ dependencies = [
  "zip",
 ]
 
+[[package]]
+name = "rustfs-ahm"
+version = "0.0.3"
+dependencies = [
+ "anyhow",
+ "async-trait",
+ "bytes",
+ "futures",
+ "lazy_static",
+ "rmp-serde",
+ "rustfs-common",
+ "rustfs-ecstore",
+ "rustfs-filemeta",
+ "rustfs-lock",
+ "rustfs-madmin",
+ "rustfs-utils",
+ "serde",
+ "serde_json",
+ "thiserror 2.0.12",
+ "time",
+ "tokio",
+ "tokio-test",
+ "tokio-util",
+ "tracing",
+ "url",
+ "uuid",
+]
+
 [[package]]
 name = "rustfs-appauth"
 version = "0.0.5"