Add enterprise multi-tenant RAG example with LangChain + Weaviate

[parikshitiiitb]

Hi Weaviate team,

I've been building production RAG systems with Weaviate for enterprise
use cases and noticed the recipes repo has no multi-tenancy examples.
Every production RAG deployment I've worked on is multi-tenant, but all
current examples show single-tenant setup.

I'd like to add a notebook covering:

• Multi-tenant collection creation with per-tenant isolation
• Document ingestion scoped to individual tenants
• Tenant-aware hybrid search with metadata filtering
• LangChain integration with tenant context
• A realistic enterprise pattern (e.g. internal knowledge base
  serving multiple business units)

Happy to submit a PR if this would be useful. Let me know if there's
a preferred location in the repo or specific Weaviate client version
to target.

[erika-shorten]

Hi @parikshitiiitb,

This sounds interesting, and I agree that this kind of recipe is missing! If you can contribute it, that would be great. If you're using LangChain, then you can add it to this folder. You can add it to the agents folder or create a new one called rag-with-multi-tenancy or something like that. Let me know if you have any questions, and thanks for contributing!

[parikshitiiitb]

Thanks for the quick response! I'll add it to a new folder called
"rag-with-multi-tenancy" under the LangChain directory.

I'll use Weaviate Embedded so it runs locally without any cloud
account making it easy for anyone to clone and run immediately.
PR coming shortly.

[parikshitiiitb]

Hi @erika-shorten, I’ve opened PR #304 for this.
Would appreciate your feedback!

[parikshitiiitb]

Hi @erika-shorten ,

just checking in on this PR. Happy to address any feedback
or make changes if needed. Let me know if there's anything I can improve!

Thanks