doc: add groups endpoints to api reference documentation

backend/src/ee/routes/v1/group-router.ts

@@ -48,7 +48,7 @@ export const registerGroupRouter = async (server: FastifyZodProvider) => {
     onRequest: verifyAuth([AuthMode.JWT, AuthMode.IDENTITY_ACCESS_TOKEN]),
     schema: {
       params: z.object({
-        id: z.string()
+        id: z.string().trim().describe(GROUPS.GET_BY_ID.id)
       }),
       response: {
         200: GroupsSchema

backend/src/lib/api-docs/constants.ts

@@ -24,6 +24,9 @@ export const GROUPS = {
     id: "The id of the group to add the user to.",
     username: "The username of the user to add to the group."
   },
+  GET_BY_ID: {
+    id: "The id of the group to fetch"
+  },
   DELETE_USER: {
     id: "The id of the group to remove the user from.",
     username: "The username of the user to remove from the group."