Fix issues with `CK{Record,Share}.SystemFieldsRepresentation` (#284)

* Fix issues with `CK{Record,Share}.SystemFieldsRepresentation`

I'm a little surprised that this diff fixes things, but it does locally
for me, in the latest Xcode 26, so let's test this change a bit before
merging.

* Compile time tests

* wip;

* wip

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Co-authored-by: Brandon Williams <[email protected]>

Add option to drop unique constraints inside SyncEngine.migratePrimar…

…yKeys (#253)

* drop unique constraints inside SyncEngine.migratePrimaryKeys

* Call down to existing helpers

* wip

* new test and fix

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Co-authored-by: Stephen Celis <[email protected]>
Co-authored-by: Brandon Williams <[email protected]>

Compute statement hashability from underlying query fragment (#245)

* Compute statement hashability from underlying query fragment

We currently depend directly on the hashability of `Statement` in the
various fetch property wrappers, but this conformance has been found to
be problematic and so we should remove it. We can make this change
today, though, before removing it, by computing the hashability of a
statement from its query fragment data.

* wip

* wip

StructuredQueries 0.22.0 support (#238)

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

* wip

Add index.

StructuredQueries Bool binding support (#171)

* StructuredQueries Bool binding support

- [ ] Update package when this is merged: pointfreeco/swift-structured-queries#164

* unsigned integers

* wip

* wip

Support for StructuredQueries' `@DatabaseFunction` macro (#145)

* Support for StructuredQueries' `@DatabaseFunction` macro

See pointfreeco/swift-structured-queries#151 for
more details.

* wip

* wip

* test

* wip

* wip

StructuredQueries 0.13.0 Support (#132)

* wip

* wip

* wip

* wip

* wip

* wip

* Remove Linux from CI while GRDB doesn't support it

More flexible sendability (#118)

* Drop sendable requirements.

* wip

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Co-authored-by: Brandon Williams <[email protected]>

Support `QueryFragment` segments (#76)

* Support `QueryFragment` segments

The next release of StructuredQueries has improved the query fragment
type and the interfaces used by SharingGRDB have been deprecated. Let's
consume the latest APIs.

* wip