Only push relevant attributes for reconciliation to reconcile service

[sroertgen]

Right now every property of a node is pushed to the reconcile service.

This is not necessary, increases index size and might lead to unwanted behavior if the same prop with a different data type is pushed.

only the relevant props defined in the reconcile scheme (https://github.com/skohub-io/skohub-reconcile/blob/main/src/elastic/schema/esSchema.json) should be pushed

[awagner-mainz]

Are the properties not potentially valuable for the preview or the data extension service? I didn't yet fully understand the latter in particular, but would that not provide "reconciliation spec coverage" for any property?