feat: implement incremental query for COW tables

[xushiyan]

Description

For performing incremental queries (latest-state mode), added table APIs

# rust
read_incremental_records(&self, start_timestamp: &str, end_timestamp: Option<&str>)

# python
read_incremental_records(self, start_timestamp: str, end_timestamp: Optional[str])

Closes #9

How are the changes test-covered

• N/A
• Automated tests (unit and/or integration tests)
• Manual tests
  • Details are described below

[codecov]

Codecov Report

Attention: Patch coverage is 93.75000% with 9 lines in your changes missing coverage. Please review.

Project coverage is 92.78%. Comparing base (d04b9ab) to head (2e252a0).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/core/src/storage/mod.rs	28.57%	5 Missing ⚠️
crates/core/src/table/mod.rs	82.60%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #236      +/-   ##
==========================================
+ Coverage   92.03%   92.78%   +0.74%     
==========================================
  Files          26       27       +1     
  Lines        1268     1344      +76     
==========================================
+ Hits         1167     1247      +80     
+ Misses        101       97       -4     

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