fix(influx): accept tagCode camelCase and emit positionVsParent tag

The asset config standardised on tagCode (camelCase) but the InfluxDB
tag emitter still read the lowercase tagcode, so any node saved through
the new editor silently emitted tags.tagcode: undefined. Read both
spellings so old + new configs both produce the tag.

Also surfaces functionality.positionVsParent as a tag so dashboards
can filter by upstream/downstream side.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/helper/outputUtils.js

@@ -104,9 +104,10 @@ class OutputUtils {
       // functionality properties
       softwareType: config.functionality?.softwareType,
       role: config.functionality?.role,
+      positionVsParent: config.functionality?.positionVsParent,
       // asset properties (exclude machineCurve)
       uuid: config.asset?.uuid,
-      tagcode: config.asset?.tagcode,
+      tagcode: config.asset?.tagCode || config.asset?.tagcode,
       geoLocation: config.asset?.geoLocation,
       category: config.asset?.category,
       type: config.asset?.type,