fix: format and clean code in core module

[msgui]

Purpose of the PR

• subtask of #2435

Main Changes

Format & clean code in submodels:

1. Core

Verifying these changes

• [ ] Trivial rework / code cleanup without any test coverage. (No Need)
• [ ] Already covered by existing tests, such as (please modify tests here).
• [ ] Need tests and can be verified as follows:
  • xxx

Does this PR potentially affect the following parts?

• [ ] Nope
• [ ] Dependencies (add/update license info)
• [ ] Modify configurations
• [ ] The public API
• [ ] Other affects (typed here)

Documentation Status

• [ ] Doc - TODO
• [ ] Doc - Done
• [ ] Doc - No Need

[codecov[bot]]

Codecov Report

Attention: 124 lines in your changes are missing coverage. Please review.

Comparison is base (7586779) 66.21% compared to head (3061943) 66.21%.

Files	Patch %	Lines
...ache/hugegraph/backend/store/raft/RaftContext.java	0.00%	10 Missing :warning:
...hugegraph/util/collection/IntMapByDynamicHash.java	53.84%	6 Missing :warning:
...raph/job/algorithm/cent/AbstractCentAlgorithm.java	0.00%	5 Missing :warning:
...g/apache/hugegraph/task/StandardTaskScheduler.java	44.44%	3 Missing and 2 partials :warning:
.../org/apache/hugegraph/variables/HugeVariables.java	0.00%	5 Missing :warning:
.../store/raft/compress/ParallelCompressStrategy.java	0.00%	4 Missing :warning:
...he/hugegraph/backend/tx/GraphIndexTransaction.java	80.00%	4 Missing :warning:
...hugegraph/job/algorithm/comm/LouvainTraverser.java	0.00%	4 Missing :warning:
...pache/hugegraph/job/computer/AbstractComputer.java	0.00%	4 Missing :warning:
...apache/hugegraph/security/HugeSecurityManager.java	33.33%	1 Missing and 3 partials :warning:
... and 48 more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #2440 +/- ## ============================================ - Coverage 66.21% 66.21% -0.01% Complexity 828 828 ============================================ Files 511 511 Lines 42598 42590 -8 Branches 5942 5939 -3 ============================================ - Hits 28208 28199 -9 + Misses 11582 11578 -4 - Partials 2808 2813 +5 ```

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