feat: simplify regional workbench language

backend/app/services/temporal_analysis_service.py

@@ -200,7 +200,7 @@ class TemporalAnalysisService:
             return (
                 TemporalObjectChanges(available=False),
                 {"type": "FeatureCollection", "features": []},
-                ["Object-level changes are unavailable because the source does not guarantee stable feature identifiers."],
+                ["Wijzigingen van individuele objecten kunnen voor deze bron niet betrouwbaar worden gevolgd."],
             )
 
         normalized_bbox = VectorFeatureService._normalize_selection_bbox(bbox)