Make risk delete prove document mapping cleanup

Removing junction rows before deleteRisk hid missing soft-delete
cleanup in e2e. Assert deleteRisk succeeds only after deleteDocument
clears mappings, and document links must be removed first.

Signed-off-by: Cursor Agent <cursoragent@cursor.com>

Co-authored-by: Bryan FRIMIN <bryan@frimin.fr>

pkg/probo/risk_service.go

@@ -612,15 +612,10 @@ func (s RiskService) Delete(
 	riskID gid.GID,
 ) error {
 	risk := &coredata.Risk{}
-	riskDocument := &coredata.RiskDocument{}
 
 	return s.svc.pg.WithTx(
 		ctx,
 		func(ctx context.Context, tx pg.Tx) error {
-			if err := riskDocument.DeleteByRiskID(ctx, tx, scope, riskID); err != nil {
-				return fmt.Errorf("cannot delete risk document mappings: %w", err)
-			}
-
 			return risk.Delete(ctx, tx, scope, riskID)
 		},
 	)