chore: better schema and query error handling

src/lib/components/popover/Popover.tsx

src/lib/data-access/api/eventBus.tsx

src/lib/data-access/broker/wsQuery.ts

src/lib/data-access/broker/wsSchema.ts

src/lib/data-access/store/graphQueryResultSlice.ts

src/lib/data-access/store/schemaSlice.ts

src/lib/schema/panel/Schema.tsx

src/lib/schema/panel/SchemaList.tsx

src/lib/vis/views/NoData.tsx