fix: build emulator from Emulator/ subdir (pom.xml lives there, not repo root)

.gitea/workflows/pack.yaml

@@ -193,8 +193,8 @@ jobs:
               echo "Emulator clone attempt $attempt failed, retrying..." >&2
               sleep 5
             done
-            [ -f "$WORK/src/emulator/pom.xml" ] || { echo "Emulator clone failed (no pom.xml)"; exit 1; }
-            cd "$WORK/src/emulator"
+            [ -f "$WORK/src/emulator/Emulator/pom.xml" ] || { echo "Emulator clone failed (no pom.xml)"; exit 1; }
+            cd "$WORK/src/emulator/Emulator"
             mvn package -q -T 1C -o -Dmaven.test.skip=true 2>&1 \
               || mvn package -q -T 1C -Dmaven.test.skip=true 2>&1
             rm -f "$S"/*.jar; find target -maxdepth 1 -name 'Polaris-*-jar-with-dependencies.jar' -exec cp {} "$S/" \; 2>/dev/null || true