key all streams and remove keyBy

[samwillis]

This removes keyBy by ensuring all streams a keyed throughout a query, using a composite key for joins and keying on a composite of the groupBy values for when thats used.

Joined keys are formed as [${mainInputKey},${joinedInputKey}] - so a key looks like: [123,234], or [123,[321,234]] for multiple joins. This is implemented in the compiled pipeline by tanstack db query compiler.

GroupBy uses a JSON front for the key with the key+values extracted for the groupBy - this is how the key works in the D2TS groupBy operator and is just exposed on the resulting pipeline.

[changeset-bot]

🦋 Changeset detected

Latest commit: e01f741

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

This PR includes changesets to release 5 packages

Name	Type
@tanstack/react-db	Patch
@tanstack/vue-db	Patch
@tanstack/db	Patch
@tanstack/db-example-react-todo	Patch
@tanstack/db-collections	Patch

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[pkg-pr-new]

@tanstack/db-example-react-todo

npm i https://pkg.pr.new/@tanstack/db@144

npm i https://pkg.pr.new/@tanstack/db-collections@144

npm i https://pkg.pr.new/@tanstack/react-db@144

npm i https://pkg.pr.new/@tanstack/vue-db@144

commit: e01f741

[KyleAMathews]

great refactor!

I think you need to update the PR body again?