implemented all get methods for GenericRow

[KaranPradhan266]

Purpose

Linked issue: close #79

Brief change log

Completed all todo!() placeholders in GenericRow’s InternalRow implementation: numeric getters (get_boolean through get_double) now use try_into, get_char enforces fixed-length semantics, and get_binary/get_bytes clone data via as_blob().

Tests

N/A

API and Format

N/A

Documentation

N/A

[Copilot]

Pull request overview

This PR completes the implementation of all getter methods in the GenericRow struct's InternalRow trait implementation. The changes replace todo!() placeholders with functional implementations using the try_into() pattern for type conversions and add the necessary supporting infrastructure in the Datum enum.

Key changes:

• Implemented numeric getters (get_boolean, get_byte, get_short, get_float, get_double) using try_into() conversions
• Implemented get_char with fixed-length validation via panic on mismatch
• Implemented binary data getters (get_binary, get_bytes) using a new as_blob() helper method
• Added Int8 variant to Datum enum with complete trait implementations (From, TryFrom, ToArrow)
• Added as_blob() helper method to Datum for binary data access

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
crates/fluss/src/row/mod.rs	Implements all previously unimplemented getter methods in GenericRow's InternalRow trait, using unwrap-based error handling consistent with existing patterns
crates/fluss/src/row/datum.rs	Adds Int8 variant to Datum enum, implements as_blob() helper, and adds all necessary From/TryFrom trait implementations for new type support

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Copilot encountered an error and was unable to review this pull request. You can try again by re-requesting a review.

[luoyuxia]

+1

[luoyuxia]

@KaranPradhan266 Thank you for the pr. Merging...