Use Variable.getName() for synthesised queried-term column

The queried-term column (Downstream_Class for an upstream call and
vice versa) was emitting variable.getId() — so the v2 table showed
"FBbt_00100246" instead of "mushroom body output neuron 11".

Variable.getName() resolves to the human label via Node.getName() on
the EMF parent (verified against org.geppetto.model/.../Node.java tag
vfb_20200604_a). Earlier I dropped it after conflating with the
AQueryResult.getValues() compile error — different issue, Variable
exposes it just fine.

Falls back to id if name is null/empty.

Author: Robbie1977

src/main/java/uk/ac/vfb/geppetto/VFBqueryJsonProcessor.java

@@ -158,11 +158,12 @@ private void buildClassConnectivityRows(Variable variable, QueryResults in, Quer
 		// the plain label text. VFBquery's API returns the partner column as
 		// markdown ("[label](id)"); strip that to the label only so the v2
 		// frontend can link both label columns from the composite ID.
-		// For the queried-term column we don't have the human label (the
-		// Variable EClass doesn't expose it cleanly at compile time and we'd
-		// otherwise need a second API call). Fall back to the id; the
-		// frontend will still resolve and link it via the composite ID.
-		String queriedLabel = queriedId;
+		// For the queried-term column we synthesise the label from the
+		// Variable's Node.getName() (the human label, set when the term-info
+		// processor created the variable). Fall back to the id if the name
+		// is null/empty.
+		String queriedName = variable != null ? variable.getName() : null;
+		String queriedLabel = (queriedName != null && !queriedName.isEmpty()) ? queriedName : queriedId;
 
 		String partnerColumn = upstreamCall ? COL_UPSTREAM : COL_DOWNSTREAM;