Implement MDL metric value

[popchanovska]

Description

Implements elif metric_name == "mdl": in autocommunity_executor.py.

Motivation

No placeholder and always 0.0 value.

Changes

            elif metric_name == "mdl":
                # Extract from algorithm metadata (SBM algorithms compute this)
                # For non-SBM algorithms, this metric is not available

                meta = result.get('meta', {})
                mdl_value = meta.get('mdl')
                if mdl_value is None:
                    mdl_value = meta.get('bic')
                value = mdl_value if mdl_value is not None else 0.0

Testing

• 'make test' executed, 120 issues found
• 'make lint' executed

Breaking Changes

None.

TODO

• Need to check how to implement MDL (if possible) in Louvain/Leiden/Infomap result dicts.
• For Louvain/Leiden/Infomap result.get('meta') returns None because the key is never set, make this consistent.
• Instead of 0.0 when there is no value, return None. Need to see how this would be then used by Pareto.
• Recheck if meta.get('bic') returns anything, because in runner.py there is no bic value for meta key.

[SkBlaz]

@popchanovska wip?