feat: adjust metrics push interval to 3 seconds

[houseme]

• Reduce metrics push frequency from default to 3s for better performance
• Optimize resource utilization during metrics collection
• Improve real-time monitoring responsiveness

Related to admin metrics optimization on fix/admin-metrics branch

Type of Change

• New Feature
• Bug Fix
• Documentation
• Performance Improvement
• Test/CI
• Refactor
• Other:

Related Issues

Summary of Changes

Checklist

• I have read and followed the CONTRIBUTING.md guidelines
• Passed make pre-commit
• Added/updated necessary tests
• Documentation updated (if needed)
• CI/CD passed (if applicable)

Impact

• Breaking change (compatibility)
• Requires doc/config/deployment update
• Other impact:

Additional Notes

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[Copilot]

Pull Request Overview

This pull request implements code quality improvements and optimizations focused on import organization, code simplification, and logging adjustments for better performance monitoring. The main purpose is to refactor code for better maintainability while optimizing metrics collection frequency from the default to 3 seconds.

Key Changes:

• Reorganized and simplified import statements across multiple files
• Changed metrics push interval default from 1 second to 3 seconds
• Replaced verbose logging (info!) with debug-level logging in metrics collection
• Simplified error handling patterns using idiomatic Rust constructs

Reviewed Changes

Copilot reviewed 14 out of 14 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
rustfs/src/version.rs	Added Apache 2.0 license header
rustfs/src/update.rs	Reorganized imports alphabetically
rustfs/src/storage/tonic_service.rs	Reorganized imports and simplified type aliases with fully qualified paths
rustfs/src/auth.rs	Simplified standard library function calls
rustfs/src/admin/handlers/user.rs	Removed extraneous blank line
rustfs/src/admin/handlers/trace.rs	Fixed typo in variable name and simplified return statement
rustfs/src/admin/handlers/tier.rs	Simplified error handling with idiomatic Rust patterns
rustfs/src/admin/handlers/sts.rs	Simplified type references
rustfs/src/admin/handlers/kms_dynamic.rs	Replaced match statements with unwrap_or_else for cleaner code
rustfs/src/admin/handlers/kms.rs	Removed redundant module path qualifiers
rustfs/src/admin/handlers/event.rs	Simplified error handling with match expressions
rustfs/src/admin/handlers/bucket_meta.rs	Removed redundant type path qualifier
rustfs/src/admin/handlers.rs	Changed metrics tick default to 3 seconds, simplified parsing logic, and added import optimizations
crates/ecstore/src/metrics_realtime.rs	Changed info logging to debug for metrics collection and added function documentation

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