Added non-null properties to database.ThenableReference

[rhodgkins]

When using push to add data a ThenableReference is returned, this reference can never have an undefined key (or parent) because it's never going to be the root reference.

[changeset-bot]

🦋 Changeset detected

Latest commit: 82c34b2

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 4 packages

Name	Type
@firebase/database-compat	Patch
@firebase/database-types	Patch
@firebase/database	Patch
firebase	Patch

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Click here if you're a maintainer who wants to add another changeset to this PR

[hsubox76]

I have seen that error before but don't remember the cause. I can't reproduce it with the current main branch, even on a fresh clone. What version of Node do you have? I'm using 22.13.1. You're only missing 3 commits from main that don't seem like they would affect anything so rebasing probably won't fix it.

[rhodgkins]

Eurgh typical, setup the container again to try again from fresh and now it's fine - I think was running the same node version (20.13.1) as before too... Oh well - thanks for your help anyway!

Do I need to include the firebase package in the change set?

[hsubox76]

Changeset seems fine. I will see if a RTDB SDK maintainer can review for RTDB specific changes.

[hsubox76]

Thanks for the PR! We already cut the staging release for the current release so it might be another 3 weeks until this rolls out to NPM.