adding back relevant vector_db files

Signed-off-by: Francisco Javier Arceo <farceo@redhat.com>

fix tests

Signed-off-by: Francisco Javier Arceo <farceo@redhat.com>

updating tests and fixing routing logic for single provider

Signed-off-by: Francisco Javier Arceo <farceo@redhat.com>

setting default provider to update tests

Signed-off-by: Francisco Javier Arceo <farceo@redhat.com>

updated provider_id

Signed-off-by: Francisco Javier Arceo <farceo@redhat.com>

updated VectorStoreConfig to use (provider_id, embedding_model_id) and add defautl vector store provider

Signed-off-by: Francisco Javier Arceo <farceo@redhat.com>

special handling for replay mode for available providers

Signed-off-by: Francisco Javier Arceo <farceo@redhat.com>

llama_stack/apis/datatypes.py

@@ -121,6 +121,7 @@ class Api(Enum, metaclass=DynamicApiMeta):
 
     models = "models"
     shields = "shields"
+    vector_dbs = "vector_dbs"  # only used for routing
     datasets = "datasets"
     scoring_functions = "scoring_functions"
     benchmarks = "benchmarks"

llama_stack/apis/vector_dbs/vector_dbs.py

@@ -4,7 +4,7 @@
 # This source code is licensed under the terms described in the LICENSE file in
 # the root directory of this source tree.
 
-from typing import Literal
+from typing import Literal, Protocol, runtime_checkable
 
 from pydantic import BaseModel
 
@@ -59,3 +59,35 @@ class ListVectorDBsResponse(BaseModel):
     """
 
     data: list[VectorDB]
+
+
+@runtime_checkable
+class VectorDBs(Protocol):
+    """Internal protocol for vector_dbs routing - no public API endpoints."""
+
+    async def list_vector_dbs(self) -> ListVectorDBsResponse:
+        """Internal method to list vector databases."""
+        ...
+
+    async def get_vector_db(
+        self,
+        vector_db_id: str,
+    ) -> VectorDB:
+        """Internal method to get a vector database by ID."""
+        ...
+
+    async def register_vector_db(
+        self,
+        vector_db_id: str,
+        embedding_model: str,
+        embedding_dimension: int | None = 384,
+        provider_id: str | None = None,
+        vector_db_name: str | None = None,
+        provider_vector_db_id: str | None = None,
+    ) -> VectorDB:
+        """Internal method to register a vector database."""
+        ...
+
+    async def unregister_vector_db(self, vector_db_id: str) -> None:
+        """Internal method to unregister a vector database."""
+        ...