Improve type hints and return value for process close

[sethrj]

No description provided.

[Copilot]

Pull request overview

Adds an optional structure field to the ORANGE BihMetadata output model, tightens CelerGeo.close to always return a dict[str, Any] (capturing any decode failure rather than silently returning the raw string), and extends plot_all_geometry to surface the matplotlib fig and a top-level colorbar in its returned mapping.

Changes:

• BihMetadata gains an optional structure: Optional[list[dict]] field.
• CelerGeo.close always returns a dict, wrapping non-JSON output as {"result": ..., "decode_error": ...}.
• plot_all_geometry returns a Mapping[Union[str, GeometryEngine], Any] and includes "fig" and (when applicable) "colorbar" entries.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
celerpy/model/output.py	Adds structure field to BihMetadata.
celerpy/visualize.py	Normalizes CelerGeo.close return type to a dict and exposes fig/colorbar from plot_all_geometry.

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