fix: clean up observableToAsyncIterable state when observable completes

[Copilot]

The Leak Test CI job was failing non-deterministically because observableToAsyncIterable never released its internal queues and subscription when the observable sent a done: true signal — leaving those references alive past the end of the test, causing Jest's --detectLeaks to flag the test suite.

Changes

• pullValue(): When shifting a done: true element off pushQueue, call emptyQueue() before resolving — clearing pullQueue, pushQueue, unsubscribing, and setting listening = false immediately rather than waiting for the iterator to be explicitly return()ed.
• pushDone(): After resolving a pending consumer (pulled from pullQueue) with the done signal, call emptyQueue() to release any remaining state.

The forward references to emptyQueue are safe: both code paths are only reachable after the iterator has been returned to the caller, which is after emptyQueue is defined.

// Before: after iterator.next() resolves with {done: true},
// pullQueue/pushQueue/subscription/listening were still held
// by the iterator's closures until explicit return() or GC.

// After: emptyQueue() is called eagerly when the done signal
// is delivered, releasing all internal references immediately.

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[changeset-bot]

🦋 Changeset detected

Latest commit: 6773282

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

This PR includes changesets to release 6 packages

Name	Type
@ardatan/relay-compiler	Patch
@graphql-tools/graphql-tag-pluck	Patch
@graphql-tools/relay-operation-optimizer	Patch
@graphql-tools/code-file-loader	Patch
@graphql-tools/git-loader	Patch
@graphql-tools/github-loader	Patch

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