Issue #3589220: Add missing schema for the displays (Attach to) option on excel_export
Summary
ExcelExportDisplayTrait::defineOptions() adds a displays option to the excel_export display plugin (the standard "Attach to" sequence), but the schema for views.display.excel_export did not declare it. Configuration Inspector reports a "missing schema" row on every view that uses this display.
Adds the same displays mapping views.display.data_export uses upstream.
Risk
Schema-only change, zero runtime behaviour impact.
Test plan
- Pipeline passes.
- After applying the patch, Configuration Inspector returns no errors for the
excel_exportdisplay (modulo the per-site integer-vs-string artefact ondisplays.default, which clears on a re-save and is documented in the issue).