Log indication of progress in sequential optimization loop

[dynobo]

The intention is to ease keeping track of the progress with respect to the configured limits.
What do you think?

Example output:

[...]
 'settings': {},
 'stacktrace': None,
 'user_info': None}
2025-08-20 10:38:00,510 - blackboxopt - INFO - Starting evaluation 17 (of inf). Overall runtime so far: 0:00:08 (timeout at 0:01:00)
2025-08-20 10:38:00,510 - blackboxopt - INFO - The optimizer proposed the following evaluation specification:
{'configuration': {'criterion': 'poisson',
                   'max_depth': 44,
[...]

[github-actions]

Coverage report

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File	Statements	Missing	Coverage	Coverage (new stmts)	Lines missing
blackboxopt/optimization_loops
sequential.py
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