feat(datastore): support checkpoint in server side

[jialeicui]

Description

Provides support for checkpoints, which later allows:

1. Only needing to save the data version indicated by the checkpoint, effectively reducing the disk and memory space occupied by the data
2. Fetch the statistical information of the data pointed by a checkpoint with constant complexity, including data row count, minimum key, maximum key, etc.

Issues to be considered: #3098

1. It is necessary to support old versions of data, and a migration logic is needed to ensure that all historical data checkpoints can be correctly processed.
2. Consider whether a Controller can rollback after an upgrade (data versions might have been garbage collected due to the checkpoint function).

Modules

• UI
• Controller
• Agent
• Client
• Python-SDK
• Others

Checklist

• run code format and lint check
• add unit test
• add necessary doc

[codecov]

Codecov Report

Attention: 20 lines in your changes are missing coverage. Please review.

Comparison is base (cf58e90) 82.68% compared to head (ff4446e) 82.74%.

Files	Patch %	Lines
...tarwhale/mlops/datastore/impl/MemoryTableImpl.java	89.18%	6 Missing and 10 partials ⚠️
.../java/ai/starwhale/mlops/datastore/Checkpoint.java	87.50%	0 Missing and 2 partials ⚠️
...n/java/ai/starwhale/mlops/datastore/DataStore.java	90.00%	1 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #3093      +/-   ##
============================================
+ Coverage     82.68%   82.74%   +0.06%     
- Complexity     3182     3232      +50     
============================================
  Files           573      575       +2     
  Lines         31969    32181     +212     
  Branches       1865     1897      +32     
============================================
+ Hits          26433    26628     +195     
- Misses         4712     4715       +3     
- Partials        824      838      +14     

Flag	Coverage Δ
console	72.09% <ø> (ø)
controller	73.55% <89.94%> (+0.19%)	⬆️
standalone	91.89% <100.00%> (+0.03%)	⬆️
unittests	91.63% <100.00%> (+0.03%)	⬆️

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