Vendored from https://github.com/BerriAI/litellm-pgvector at commit
`b553f84a32f580b4303297df5567f25912b59d93` (main, 2026-09-02). See
`docker-compose.yml`'s `litellm-pgvector` service comment for why this is
vendored instead of built from a remote git context.

**Local changes on top of that commit** (found smoke-testing issue #24 —
without these, the store can never be searched or written to):

- `prisma/schema.prisma`: `Embedding.embedding` was `vector(1536)`
  (OpenAI ada-002's size); changed to `vector(768)` to match this stack's
  actual embedding model (nomic-embed-text-v1.5).
- `models.py` / `main.py`: `POST /v1/vector_stores` always minted a random
  UUID for the new store's `id`, ignoring anything the caller asked for.
  Added an optional `id` field to `VectorStoreCreateRequest` and made
  `create_vector_store` use it when given — `litellm-config.yaml`'s
  `vector_store_registry` addresses this store by a fixed id
  (`memory-and-notes`), which never matched a real row otherwise.

Re-applying these after a re-vendor: diff this directory against upstream
before overwriting, or just redo the three edits above.

To update: `git clone https://github.com/BerriAI/litellm-pgvector.git`
somewhere, copy everything except `.git/` over this directory, re-apply the
local changes above, update the commit hash above, and run
`./scripts/update.sh`.