BTree data race fix

[KazaiMazai]

The PR fixes a possible data race of the underlying BTree since it can contain shared reference-type BtreeNodes

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Note

Converts Index.ComparableValue to a locked reference model to prevent BTree data races, adds EntityRefModel macro and wiring, and bumps macOS minimum to 13.

• Indexing / Concurrency:
  • Convert Index.ComparableValue from @EntityModel struct to @EntityRefModel final class and mark @unchecked Sendable.
  • Add OSAllocatedUnfairLock and wrap reads/writes (sorted, filter, contains, grouped, update, remove) with lock; move mutating internals to private _ helpers.
• Macros:
  • Introduce EntityRefModel macro and register in Macros.swift and MacrosPlugin.
  • Update EntityModelMacro to handle classes by generating entityRefModelProtocol and nonmutating normalize(); add supporting codegen helpers.
• Build:
  • Raise macOS deployment target to v13.

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Bug: Missing lock protection on `sorted` property causes race

The sorted computed property accesses the index dictionary directly without acquiring the lock, creating a data race. All other public methods that read from or write to index (such as filter, contains, grouped, update, and remove) are wrapped with lock.withLock { }, but sorted was missed. This property is actively used in QuerySorted.swift when sorting queries, so concurrent reads via sorted and writes via update/remove can cause undefined behavior.

Sources/SwiftletModel/Index/Index+Comparable.swift#L27-L30

SwiftletModel/Sources/SwiftletModel/Index/Index+Comparable.swift

Lines 27 to 30 in 09701a0

	var sorted: [Entity.ID] {
	index.flatMap { $0.1.elements }
	}

 

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