Why this change is needed:
LightRAG creates storage instances by passing its own self.workspace field,
not the workspace parameter from vector_db_storage_cls_kwargs. This caused
E2E tests to fail because the workspace was set to default "_" instead of
the configured value like "prod" or "workspace_a".
How it solves it:
- Pass workspace directly to LightRAG constructor as a field parameter
- Remove workspace from vector_db_storage_cls_kwargs where it was being ignored
- This ensures self.workspace is set correctly and propagated to storage instances
Impact:
- Fixes test_backward_compat_old_workspace_naming_qdrant migration failure
- Fixes test_workspace_isolation_e2e_qdrant workspace mismatch
- Proper workspace isolation is now enforced in E2E tests
Testing:
- Modified two Qdrant E2E tests to use correct workspace configuration
- Tests should now find correct legacy collections (e.g., prod_chunks)
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