fix(graphql): preserve hasMany relationship order in populated results (replacement of #17004) - #17496
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hasMany relationship and upload fields could return populated documents in the wrong order when a single relationship to the same collection was queried before the array field in the same request. The populate promises run in parallel via Promise.all and pushed onto results in resolution order, so a dataloader cache hit on a shared document settled out of input order. Assign each populated doc to its source index instead of pushing, then filter out the holes left by skipped entries, so the returned list always matches the stored order regardless of which promise settles first.
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Replacement of #17004 by @yashs33244. Original was CONFLICTING — rebased onto main, conflict resolved in test/graphql/int.spec.ts (merged with new nullable schema types test).