fix(litellm-pgvector): honor caller-supplied id on vector store create

POST /v1/vector_stores always minted a random UUID for the new store's id,
ignoring the request entirely. litellm-config.yaml's vector_store_registry
addresses this store by a fixed id (memory-and-notes), which could never
match a real row as a result — every search/write 404'd.

Added an optional id field to VectorStoreCreateRequest; create_vector_store
uses it when given, falls back to a random UUID otherwise (unchanged
behavior for callers that don't care).

vendor/litellm-pgvector/models.py

@@ -5,6 +5,12 @@ from datetime import datetime
 
 class VectorStoreCreateRequest(BaseModel):
     name: str
+    # ponytail: not part of upstream litellm-pgvector — added locally so
+    # callers (litellm's vector_store_registry, scripts/ingest-memory.sh)
+    # can pin a human-readable id instead of getting a random UUID back.
+    # litellm-config.yaml's vector_store_registry addresses stores by a
+    # fixed vector_store_id, which only works if creation can honor it.
+    id: Optional[str] = None
     file_ids: Optional[List[str]] = None
     expires_after: Optional[Dict[str, Any]] = None
     chunking_strategy: Optional[Dict[str, Any]] = None