No boxing for structs

[SergerGood]

No description provided.

[roji]

Thanks! Apart from the minor indentation issue this looks good.

It's also possible to simplify the Equals(object) method to something like the following, if you feel like doing that in this PR:

public override bool Equals(object obj)
    => obj is CompiledQueryCacheKey other && Equals(other)

[roji]

Looks good, thanks! Two other structs which come to mind here are StoreObjectIdentifier (used as Dictionary key here), ValueBuffer which already has Equals. @AndriySvyryd may have other ideas.

If you're uncomfortable with any of these of prefer to scope them out, just say so.

[SergerGood]

Oops) StoreObjectIdentifier added by someone.
And ValueBuffer added in this commit already.

[roji]

Thanks for this contribution @SergerGood!