[tracking issue] Change Data Feed read path

[OussamaSaoudi-db]

Change Data Feed is a feature of the Delta protocol that allows users to scan all row-level changes that happened for each commit.

Completed

• Move log segment into separate module #438
• Add methods for constructing LogSegment for Snapshot and for TableChanges #495
• Add table changes constructor #505
• Implement Builder for Scans on TableChanges  #521
• Add Cdc action for Change Data Feed #506
• Implement Log Replay for Change Data Feed #540
• ScanFile expression and visitor for CDF #546
• Resolve deletion vectors to find inserted and removed rows for CDF #568
• Helper methods for CDF Physical to Logical Transformation #579
• TableChangesScan::execute and end to end testing for CDF #580
• Add TableChangesScan::schema method to get logical schema #589
• Add fix for sv extension #591

Remaining

• additional testing (TODO issue)
• [In progress] Allow CDF scans with schema evolution #523
• support column mapping
• ensure all protocol reader verision 1-3 supported and all reader features (col mapping, DVs, timestampNtz, vacuum protocol check) (note v2checkpoint not supported elsewhere yet)
• [In progress] Add support for In-Commit Timestamps #559
• type widening support: feat: Add type widening support to schema compatibility check #623
• add a user guide (and revisit docs)

Future work (out of scope)

• (later) Support schema evolution for tables with column mapping enabled
• (later) improve error message when performing CDF using a predicate that references a CDF generated column. Currently this fails, but the error message is not very clear.

[OussamaSaoudi-db]

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