doc: better /get-sessions documentation.

src/common/contract/get-sessions.ts

@@ -64,8 +64,8 @@ export function exportGetSessionsSchema(z: Z) {
     }),
     id: z.string().optional().openapi({
       title: "Session GUID",
-      description: "A filter for the session GUID",
-      example: "11111111-2222-3333-4444-555555555555",
+      description: "If present, filters the returned sessions by only looking for the ones that contain the given string inside their ids (it can also be the full id)",
+      example: "1-2222-333",
     }),
   });