validator: add filtering tests that were removed from test.py

[smoczy123]

We add two test cases from test.py that were removed when filtering support was added. We change the ck test, as now we support it.

Fixes: VECTOR-479

[Copilot]

Pull request overview

Adds back filtering-focused validator coverage that previously existed in test.py, ensuring ANN query filtering behavior stays regression-tested as filtering support evolves (VECTOR-479).

Changes:

• Registers two additional filtering test cases in the validator test suite.
• Adds a new test validating ANN queries filtered only by clustering key (ck) return only matching rows (with and without ALLOW FILTERING).
• Adds a new test asserting ANN queries filtered by an indexed non-primary-key column are still rejected (even with ALLOW FILTERING).

[nyh]

Hi guys, I was adding pre-filtering (filtering on the vector store side) and projection (returning filtering columns together with the result) to Alternator, and I discovered that filtering was only partially implemented in the vector store, and fixed it and expanded it in the following PR: #444

Now I'm worried that maybe I've been colliding with some unmerged work that you guys are doing in parallel :-(

Can you please take a look?

[knowack1]

Hi guys, I was adding pre-filtering (filtering on the vector store side) and projection (returning filtering columns together with the result) to Alternator, and I discovered that filtering was only partially implemented in the vector store, and fixed it and expanded it in the following PR: #444

Now I'm worried that maybe I've been colliding with some unmerged work that you guys are doing in parallel :-(

Can you please take a look?

I left some comments on #444. I think this falls under the scope of VECTOR-561, which is assigned to @ewienik , but I don't see any associated development branch.

[smoczy123]

Changelog:

• adressed @knowack1 comments