fix: QdrantDocumentStore removing duplicated tests already covered by haystack Mixin tests + fixing dedup + adding missing Async test

[davidsbatista]

Related Issues

• fixes https://github.com/deepset-ai/haystack-private/issues/501

Proposed changes

• Removed duplicataed tests, now relying on Mixng

• Python treats 1 == True == 1.0, so the plain set() used to dedupe unique metadata values collapsed them into one when a field held mixed types across documents. Now dedupes by (type(value), value) instead of value alone, so values of different types stay distinct.

• The sync test class already overrides test_get_metadata_field_unique_values_pagination with an order-tolerant check (page size / total count / no overlap), since Qdrant's scroll() doesn't guarantee value order. The async class was missing the equivalent override

Checklist

• I have read the contributors guidelines and the code of conduct
• I have updated the related issue with new insights and changes
• I added unit tests and updated the docstrings
• I've used one of the conventional commit types for my PR title: fix:, feat:, build:, chore:, ci:, docs:, style:, refactor:, perf:, test:.

[github-actions]

Coverage report (qdrant)

Click to see where and how coverage changed

File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
integrations/qdrant/src/haystack_integrations/document_stores/qdrant
document_store.py					754
Project Total

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