feat: KeyValueStore.recordExists()

[barjin]

Testing for record existence with getValue() puts an unnecessary load on the Apify Platform / the storage backend - the client has to load the value just to throw it away in the next step.

recordExists() tests for the existence of a KVS key-value pair without actually retrieving the value itself.

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side note: we should probably bump the apify-client dependency in apify-sdk, release a new version(?) and have Crawlee depend on this (and greater) versions of apify-sdk, right?

Also, it's been some time since I did something with the storages, what's the procedure there? Are we still maintaining the apify-storage-local package - if so, we should probably add this method there as well

[barjin]

Thanks for the approval, but also please see the description if you have the time 😄 What is our modus operandi when updating storage, and what changes need to be made and where? The more I think about it, the less I remember how we do this.

[vladfrangu]

side note: we should probably bump the apify-client dependency in apify-sdk, release a new version(?) and have Crawlee depend on this (and greater) versions of apify-sdk, right?

Sounds fair to me, not sure what @B4nan thinks about it 👀

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Also, it's been some time since I did something with the storages, what's the procedure there? Are we still maintaining the apify-storage-local package - if so, we should probably add this method there as well

We still are supposed to maintain it, yes (even tho I also don't like it 😢). If you've got more burning stuff on your plate I can handle that once we merge this in!

[barjin]

Cheers, that's what I thought 👍🏽 but we should probably have it in the local-storage first (before merging this), so we don't try to call a non-implemented storage method from Crawlee, no? I can make that PR now, just wanted to check if there isn't anything else to keep in mind

[B4nan]

Yes and yes, we want to require the latest client in all of the places that require the new API, and this needs to work with the sqlite storage too.