feat: integrate parsed stats with data skipping

[DrakeLin]

🥞 Stacked PR

Use this link to review incremental changes.

• stack/has_compatible_parsed_stats [Files changed]
  • stack/read-parsed-stats [Files changed]

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What changes are proposed in this pull request?

This PR enables reading pre-parsed statistics (stats_parsed) directly from checkpoint files for data skipping, avoiding JSON parsing overhead.

DataSkippingFilter Updates

• Add select_stats_parsed_evaluator for extracting add.stats_parsed from checkpoint batches
• Update constructor to accept checkpoint_read_schema and has_compatible_stats_parsed parameters
• Update apply() to take is_log_batch parameter:
• Commit batches (JSON log files): Always parse JSON stats
• Checkpoint batches with compatible stats_parsed: Use stats_parsed directly
• Checkpoint batches without stats_parsed: Parse JSON stats

How was this change tested?

Add new test table tests/data/parsed-stats/ with:

• 6 data files (100 rows each, ids 1-600)
• Checkpoint at version 3 with stats_parsed
• 2 commit files after checkpoint

Integration Tests

• Add data_skipping_with_parsed_stats test verifying:
• Skip all files when predicate matches none
• Skip to single file for highly selective predicates
• Correct file counts for various predicates on both checkpoint and commit files

[codecov]

Codecov Report

❌ Patch coverage is 89.74359% with 32 lines in your changes missing coverage. Please review.
✅ Project coverage is 84.70%. Comparing base (d4ecc0a) to head (5bbf538).

Files with missing lines	Patch %	Lines
kernel/src/log_segment.rs	87.83%	9 Missing ⚠️
kernel/src/scan/data_skipping.rs	77.50%	3 Missing and 6 partials ⚠️
kernel/src/scan/mod.rs	85.71%	3 Missing and 3 partials ⚠️
kernel/src/scan/log_replay.rs	97.11%	1 Missing and 2 partials ⚠️
kernel/src/parallel/sequential_phase.rs	80.00%	0 Missing and 2 partials ⚠️
kernel/src/scan/data_skipping/stats_schema.rs	85.71%	0 Missing and 2 partials ⚠️
kernel/src/table_changes/log_replay.rs	90.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1639      +/-   ##
==========================================
+ Coverage   84.65%   84.70%   +0.05%     
==========================================
  Files         123      123              
  Lines       34109    34328     +219     
  Branches    34109    34328     +219     
==========================================
+ Hits        28875    29079     +204     
- Misses       3905     3919      +14     
- Partials     1329     1330       +1     

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