fix: deduplicate fragments when generating persisted document hash

[felamaslen]

resolves #341

[changeset-bot]

🦋 Changeset detected

Latest commit: ef3f3c1

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

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Name	Type
@0no-co/graphqlsp	Patch

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[felamaslen]

I'm not sure if you'd count this as a breaking change. It is really a bug fix, but it would mean that certain documents which previously passed npx gql-tada check will no longer pass.

[JoviDeCroock]

Would be good to add a changeset and double check the implementation of the CLI whether the ordering could be different. It's a patch

[JoviDeCroock]

The ClI impl feels a bit simpler with the seen set but comes down to the same thing so good to go https://github.com/0no-co/gql.tada/blob/main/packages/cli-utils/src/commands/generate-persisted/thread.ts

[felamaslen]

Yep was just about to say the same thing. Ordering is the same in each case.