Bump optuna from 4.8.0 to 4.9.0

[dependabot]

Bumps optuna from 4.8.0 to 4.9.0.

Release notes

Sourced from optuna's releases.

v4.9.0

This is the release note of v4.9.0.

Highlights

Enhance Multi-Objective Constrained Parallel Optimization in GPSampler

@​sawa3030 introduces parallelization enhancements to GPSampler, leveraging the Kriging Believer approach for constrained and multi-objective optimization (#6481). This improvement allows for more efficient exploration when multiple trials are running concurrently.

The GP surrogate is updated by assigning temporary objective function values ​​to the running trials.

For more technical details and benchmarks, please check out our blog post: Improving Optuna’s GPSampler Parallelization by Considering Running Trials.

Deprecate Several Features

The following features are deprecated in v4.9.0 and scheduled for removal in v6.0.0.

optuna

• Several arguments in TPESampler (#6635)
  • prior_weight, consider_magic_clip, consider_endpoints, gamma, weights, hyperopt_parameters: These internal parameters are being deprecated to simplify the interface, as the default settings are optimal for most use cases.
  • warn_independent_sampling: Deprecated because TPESampler now robustly supports both independent and joint sampling, making this warning obsolete.
  • categorical_distance_func: This advanced feature will be migrated to OptunaHub in the future.
• x0 and sigma0 options in CmaEsSampler (#6624)
  • These options have been deprecated because they require a deep understanding of CmaEsSampler's internals to be configured effectively.
• optuna.terminator module (#6668)
  • This feature will be migrated to OptunaHub in the future.
• RetryFailedTrialCallback (#6670)
  • This class has been renamed to RetryHeartbeatStaleTrialCallback to better reflect its behavior and avoid confusion with general trial retries (#6085).
• optuna.integration module
  • The optuna.integration module currently acts as a shortcut to the external optuna_integration package for backward compatibility. Please import directly from the optuna_integration package going forward.

optuna-integration

• PyCmaSampler: Please use Optuna's native CmaEsSampler instead.
• CometCallback: This feature will be migrated to OptunaHub in the future.
• MLflowCallback: This feature will be migrated to OptunaHub in the future.
• TensorBoardCallback: This feature will be migrated to OptunaHub in the future.
• TrackioCallback: This feature will be migrated to OptunaHub in the future.
• WeightsAndBiasesCallback: This class has already been migrated to OptunaHub.

Breaking Changes

• Deprecate PyCmaSampler (optuna/optuna-integration#276)
• Add deprecation message for CometCallback (optuna/optuna-integration#280)
• Add deprecation message for MLflowCallback (optuna/optuna-integration#281)

... (truncated)

Commits

• 4db42e3 Merge pull request #6691 from c-bata/backport-v4.9-attestations
• 6a15cf0 Add attestations: false to fix release workflow
• a592e6c Merge pull request #6684 from c-bata/bump-up-to-v4.9.0
• 490cfd6 Bump up to version number v4.9.0
• 6135d54 Merge pull request #6651 from nabenabe0928/add-brute-force-info-to-grid-sampler
• c41ec2d Merge remote-tracking branch 'upstream/master' into add-brute-force-info-to-g...
• f845a8f Fix
• 574749e Fix
• af7fe8b Add note to best trial
• b200bfb Update the NSGA-III doc
• Additional commits viewable in compare view

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