catch error if indicator is sent without attribute that has no predefined attribute

Looks like this if you select Cycleways and Attribute Completeness
```
Sorry, we were unable to process your query!
RequestValidationError
Input should be 'house-number', 'address-state', 'lit', 'public-transport-stop-area', 'emergency', 'bus-lines', 'address-postcode', 'source', 'roof-shape', 'healthcare-vaccination-centre', 'website', 'lanes', 'roof-levels', 'building-colour', 'surface', 'wheelchair-accessibility', 'leaf-type', 'roof-material', 'height', 'building-levels', 'public-transport-platform', 'healthcare-blood-donation', 'cycleway-share-busway', 'crossing', 'sport-swimming', 'sidewalk', 'voltage', 'tactile-paving', 'address-district', 'address-street', 'building-material', 'roof-colour', 'operator', 'address-country', 'phone-number', 'oneway', 'sport', 'opening-hours', 'name', 'sport-weightlifting', 'shelter', 'maxspeed', 'cycleway', 'trash-bin', 'departures-board', 'brand', 'craft-winery', 'Website', 'healthcare-birthing-centre', 'shop-name', 'parking', 'healthcare-rehabilitation', 'bench', 'cable', 'tunnel-yes', 'address-suburb', 'location', 'sport-fitness', 'leisure-playground', 'address-city', 'frequency', 'tourism-theme-park', 'speciality' or 'access'
Field required
Field required
Extra inputs are not permitted
```

Reproduce the issue by selecting Cycleways and Attribute Completeness, then trace the indicator request validation that emits the shown RequestValidationError. Identify the expected handling for an indicator sent without a predefined attribute; done means the combination is handled without the current unprocessed validation error.

Written by the indexing model from the issue text.