Continuity check: conductors in different cables are no divergence

checkContinuity() reported potential_mismatch on "cable" whenever the
conductors of one potential ran in different cables. A conductor held
by a cable carries its own core's label in the cable field (15W1:BN,
written by CableManager); a potential spread over several cables is the
normal case, e.g. a neutral fed from a terminal strip into each room.
On a house installation every N and PE potential was flagged.

Conductors held by a cable are left out of the cable comparison; the
free-text cable field of other conductors is still compared.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

sources/scripting/qetscriptapi.cpp

@@ -5379,6 +5379,15 @@ QVariantList QetScriptApi::checkContinuity(int folioIndex)
 			QHash<QString, QSet<QString>> distinct_values;
 			for (Conductor *pc : std::as_const(potential)) {
 				for (const QString &prop : checked_properties) {
+						//A conductor held by a cable carries its core's label
+						//(15W1:BN) in the cable field, written by CableManager:
+						//one conductor, one core. Two conductors of a potential
+						//running in two cables are the normal case, not a
+						//divergence.
+					if (prop == QLatin1String("cable")
+							&& !pc->properties().m_cable_uuid.isNull()) {
+						continue;
+					}
 					distinct_values[prop].insert(conductorPropertyValue(pc->properties(), prop));
 				}
 			}