[Feature] New Edge Attribute: EdgeFromSourceNodeAttribute

[icedoom888]

Is your feature request related to a problem? Please describe.

To be used in the multi-encoder setting.
The model needs to know if nodes and edges come from lam or global dataset.

• For nodes this can be done with the cutout mask node attribute.
• Needs to be implemented for edges too.

Describe the solution you'd like

Introduce a new edge attribute AttributeFromNode.
AttributeFromNode will copy an attribute of either the source or destination node to the edge.
Accesses origin/target node attribute and propagates it to the edge.
Used for example to identify if an encoder edge originates from a LAM or global node.

Attributes

• node_attr_name : Name of the node attribute to propagate.
• node_type : Pick the node to copy from source or destination

Describe alternatives you've considered

No response

Additional context

No response

Organisation

MeteoSwiss