fix(lightspeed): stop hardcoding vector_store_ids to product docs only

The backend plugin was explicitly setting vector_store_ids to only
the rhdh-product-docs vector store, which prevented BYOK (Bring Your
Own Knowledge) RAG sources from being queried via inline RAG.

By removing this override, the lightspeed-stack uses its own rag.inline
config to determine which stores to query, enabling multi-source RAG.

Author: Rajin Kichannagari

workspaces/lightspeed/plugins/lightspeed-backend/src/service/router.ts

@@ -134,8 +134,6 @@ export async function createRouter(
     lightspeedCoreBaseUrl,
     logger,
   );
-  let lightspeed_vector_store_id: string = '';
-
   // Parse admin-configured MCP servers from app-config.
   // Only name is required; token is optional (users can provide their own via the UI).
   // URLs come from LCS (GET /v1/mcp-servers), not from app-config.
@@ -601,19 +599,6 @@ export async function createRouter(
 
         logger.info(`/v1/query receives call from user: ${userEntityRef}`);
 
-        // get the vector store id for the rhdh-product-docs vector store
-        if (lightspeed_vector_store_id === '') {
-          const vectorStores = await vectorStoresOperator.vectorStores.list();
-          lightspeed_vector_store_id =
-            vectorStores.data.find((v: any) =>
-              v.name.startsWith('rhdh-product-docs'),
-            )?.id || '';
-        }
-
-        if (lightspeed_vector_store_id !== '') {
-          request.body.vector_store_ids = [lightspeed_vector_store_id];
-        }
-
         const userQueryParam = `user_id=${encodeURIComponent(userEntityRef)}`;
         request.body.media_type = 'application/json'; // set media_type to receive start and end event
         // if system_prompt is defined in lightspeed config