feat(agents-api): Add embeddings to doc get/list response

[HamadaSalhab]

[!IMPORTANT] Add embeddings to document retrieval and listing responses in Docs.py, get_doc.py, list_docs.py, and models.tsp.

• Behavior:
  • Add embeddings field to Doc model in Docs.py and models.tsp.
  • Include embeddings in the response of get_doc() in get_doc.py and list_docs() in list_docs.py.
• Queries:
  • Update get_query in get_doc.py to retrieve embedding data.
  • Update get_query in list_docs.py to include embedding data.
• Models:
  • Modify Doc model in models.tsp to include optional embeddings field with read visibility.

^{This description was created by for 70eebc4724791cb1148fab372dee766c86064df8. It will automatically update as commits are pushed.}