Weaviate multitenancy support

[Timtech4u]

The changes introduce multitenancy support to the WeaviateRM class. A new optional parameter tenant_id is added to the constructor, allowing the user to specify a tenant ID. This tenant ID can also be provided as a keyword argument during query execution. When a tenant ID is specified, all retrieval requests are scoped to the given tenant ID, ensuring tenant-specific data access within a multitenant Weaviate instance.

[okhat]

Thanks @Timtech4u ! Requesting review from @CShorten if he has a minute :D

[CShorten]

Thanks so much for adding this @Timtech4u and the tag @okhat!

Approved!

Made a few small changes:

Caught one missing .with_tenant and added two documentation comments explaining the tenant_id constructor argument and a general blurb about what Multi-Tenancy is.

=== Broader Comments ===

Going forward I don't think this is the best pattern for Multi-Tenancy and DSPy Modules in Production -- probably better to pass tenant_id in the forward pass versus as internal state to the Module. This looks good for now, but will keep an eye on this as it evolves.

cc @hsm207

[Timtech4u]

Amazing! Thank you @CShorten