Kv Table Integration tests

[leekeiabstraction]

Purpose

Linked issue: close #182

Brief change log

Add integration tests for KvTable"

1. Upsert + Lookup
2. Upsert + Update + Lookup
3. Upsert + Delete + Lookup
4. Lookup (non-existent)
5. Various operations on partial update column
6. Various operations on multiple PK table

Tests

Test runs locally successfully

[leekeiabstraction]

@luoyuxia @fresh-borzoni @AndreaBozzo Appreciate your reviews here

[fresh-borzoni]

@leekeiabstraction Thanks for the PR. Left minor comments.
PTAL

[Copilot]

Pull request overview

This pull request adds comprehensive integration tests for KV (Key-Value) table operations in the Fluss client library. The tests verify core KV table functionality including upsert, lookup, update, delete operations, and advanced features like composite primary keys and partial column updates.

Changes:

• Added new integration test module kv_table.rs with 6 test cases covering all major KV table operations
• Fixed unnecessary mut qualifier on unused variable in table.rs
• Registered the new test module in the test suite

Reviewed changes

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

File	Description
crates/fluss/tests/test_fluss.rs	Added kv_table module to the integration test suite
crates/fluss/tests/integration/table.rs	Removed unnecessary mut qualifier from all_ids variable that is never mutated
crates/fluss/tests/integration/kv_table.rs	New comprehensive integration test suite for KV table operations including upsert, lookup, update, delete, composite keys, and partial updates

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[leekeiabstraction]

@fresh-borzoni TY for your review. Updated, PTAL!

[luoyuxia]

@leekeiabstraction Thanks for the pr. Left minor commet

[leekeiabstraction]

Thank you @luoyuxia for the review. Addressed your comment, PTAL!

[fresh-borzoni]

@leekeiabstraction LGTM.
Thank you for the PR

[luoyuxia]

@leekeiabstraction Thanks. LGTM

[luoyuxia]

@leekeiabstraction The test fails

[leekeiabstraction]

@luoyuxia Thank you, I've updated the polling logic to wait for Tablet server availability as well. PTAL