Qdrant: add migration utility function for Sparse Embedding support #659
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Add a utility function to migrate an existing
QdrantDocumentStore
to a new one with support for sparse embeddings.Related to #578
Inspired by @lambda-science's migration script reported in #578 (comment)
Applies to on-premise and cloud instances of Qdrant but does not work for local in-memory/disk-persisted instances.
I tested it locally with 10K documents.
Since our tests are based on memory instances of Qdrant, to test the migration function in the CI,
we should rework our testing suite introducing Docker.