Source Model Traceability about erdblick HOT 2 OPEN

I would see this issue more in mapget, to be honest. We need to be able to attach source model blobs to TileFeatureLayers, and then add source model references to attributes/geometry in an efficient way. On the erdblick side, we need to figure out how the user is supposed to interact with these links in the frontend.

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Ideas from @reinco:

• (a) Show complete blob content. One idea is to add tiles as features. When clicking a tile the blob content is shown in the feature info panel.
• (b) if an array id / feature id is shown in a panel allow to expand towards the location in the blob inspector tree view. This could be easy from the raw data view in (1). For example: the raw view tree would have a element with a reference in the blob like 'laneLayer.laneGroup[10].lane[1].laneId'. That reference can be directly looked up in the smart layer blob

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