fix: remove Quelle & Herkunft panel from demand MatchDetail

Internal data provenance is irrelevant for property seekers.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/pages/demand/MatchDetail.tsx

@@ -22,7 +22,6 @@ import {
   TradeoffPanel,
   RiskPanel,
   MissingInformationPanel,
-  SourceProvenancePanel,
   FutureAvailabilityContextPanel,
   NextActionsPanel,
 } from '../../components/match-detail'
@@ -540,7 +539,7 @@ export default function MatchDetail() {
           <TradeoffPanel match={match} />
           <RiskPanel match={match} />
           <MissingInformationPanel match={match} />
-          <SourceProvenancePanel property={property} />
+
           {isFuture && <FutureAvailabilityContextPanel match={match} signal={signal} />}
         </Box>