fix: incorrect caching for queries participating in fixpoint

[MichaReiser]

This is a follow up to #836 and may fix the hang in #831

I'm very sorry for not adding any tests but I'm very short on time right now. I'll create an issue if we go ahead with
merging this change to follow up with tests

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[codspeed-hq]

CodSpeed Performance Report

Merging #843 will improve performances by 7.9%

_{Comparing MichaReiser:more-fixpoint (de69f42) with master (f8cd8e7)}

Summary

⚡ 1 improvements
✅ 11 untouched benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	converge_diverge	144.9 µs	134.3 µs	+7.9%

[MichaReiser]

The perf change is interesting, considering that we're invalidating more often but maybe it's because we return Unchanged for initial

[carljm]

Thank you!

[carljm]

@MichaReiser note I rebased this on latest main branch to unblock @dhruvmanila (needed the loom gating fix)

[Veykril]

I just checked, this does not fix the hang for us unfortunately.

[MichaReiser]

I just checked, this does not fix the hang for us unfortunately.

Hmm, that's sad

[MichaReiser]

I created an issue to explore renabling backdating #847