Optimizing Eager Aggregation

[ShixiongQi]

Description

This PR is to optimize eager aggregation mode by reducing the deepcopy of base weights. This improved implementation only requires one deepcopy operation per round. This PR also updates the suggested GoLang version in prerequisites.md.

Type of Change

• [x] Bug Fix
• [ ] New Feature
• [ ] Breaking Change
• [ ] Refactor
• [ ] Documentation
• [ ] Other (please describe)

Checklist

• [ ] I have read the contributing guidelines
• [ ] Existing issues have been referenced (where applicable)
• [ ] I have verified this change is not present in other open pull requests
• [ ] Functionality is documented
• [ ] All code style checks pass
• [ ] New code contribution is covered by automated tests
• [ ] All new and existing tests pass

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 5.47%. Comparing base (c4d7e60) to head (83a59cd). Report is 39 commits behind head on main.

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Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #588 +/- ## ========================================= - Coverage 15.25% 5.47% -9.78% ========================================= Files 52 147 +95 Lines 2885 7164 +4279 ========================================= - Hits 440 392 -48 - Misses 2416 6738 +4322 - Partials 29 34 +5 ```

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