List documents in collection returns documents containing only the requested collectionId

[LeoHelfferich]

Describe the bug
When requesting documents by collectionId, the documents always contain only one collection ID - from the collection we requested it for. It does not represent the true data state. When fetching the document with other endpoints, the correct data is inside collectionIds field is returned.

To Reproduce
Steps to reproduce the behavior:

1. Create n>=2 collections
2. Create a document and add it to all n collections
3. Fetch document by id => field collectionIds contains n IDs (positive confirmation)
4. List documents in collection C (C = random collection ID) => field collectionIds in document object contains only C

Expected behavior
Fetched/returned documents data should be identical across API requests, as long as the data itself does not change.
Documents returned by https://api.sciphi.ai/v3/collections/:id/documents endpoint return documents which contain only the collectionId provided as argument, but should contain all collectionIds they are connected to.

Screenshots

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