Bump optuna from 4.1.0 to 4.8.0

[dependabot]

Bumps optuna from 4.1.0 to 4.8.0.

Release notes

Sourced from optuna's releases.

v4.8.0

This is the release note of v4.8.0.

Highlights

Support for Constant Liar Strategy to GPSampler

A constant liar strategy for efficient parallelization has been introduced to GPSampler by @​sawa3030. The figures (left: v4.7.0, right: v4.8.0) show that the overlap of search points has decreased, and a wider variety of solutions are being explored. The experiment uses n_jobs = 10 and n_trials = 100. Currently, this feature supports single-objective and unconstrained optimization. Further extensions are coming in v4.9.0.

v4.7.0	v4.8.0

SHAP-like beeswarm plot visualization

@​yasumorishima introduces the new visualization to OptunaHub. Please refer to https://hub.optuna.org/visualization/plot_beeswarm/ for details.

New Features

• Add Trackio Integration for Optuna (optuna/optuna-integration#259, thanks @​ParagEkbote!)
• Add constant liar strategy to GPSampler (#6430)

Enhancements

• Validate artifact_id in FileSystemArtifactStore to prevent path traversal (#6432, thanks @​RinZ27!)
• fix: correct inverted warning message in pareto front plot (#6498, thanks @​aerosta!)

Bug Fixes

• Fix shared callback state in parallel OptunaSearchCV with LightGBM (optuna/optuna-integration#260, thanks @​Quant-Quasar!)
• Fix GPSampler crash when torch default device is CUDA (#6418, thanks @​VedantMadane!)
• Fix combination between PartialFixedSampler and TPESampler with group decomposed search space (#6428)
• Fix TPESampler with multivariate and constant_liar (#6505)

Documentation

• Add documentation indicating that WilcoxonPruner requires scipy (#6477)
• Remove version & language selectors in the sidebar of docs (#6482)

Examples

• Apply black 26.1.0 (optuna/optuna-examples#348)
• Remove CI workflow for allennlp since no longer maintained (optuna/optuna-examples#351)
• Reduce the frequency of scheduled CI triggers (optuna/optuna-examples#352)
• Remove the scheduled trigger for aim CI (optuna/optuna-examples#353)
• Add constraint to transformers (optuna/optuna-examples#355)

Tests

... (truncated)

Commits

• 689c62d Merge pull request #6509 from y0z/feature/bump-up-release480
• 9e2e065 Bump up version
• 54fe633 Merge pull request #6507 from sateeshkumarb/master
• 8efb8b4 Move imports used for typecheck under TYPE_CHCKING
• c0fcd2e Merge pull request #6506 from acabellom/fix-fstring-file
• 087cc9d Replace .format() with f-strings in 002_configurations.py
• 274f5b9 Merge pull request #6505 from not522/fix-multivariate-constant_liar
• ce882f6 Revert "Merge pull request #6265 from not522/relative-use-cache"
• f9e546d Merge pull request #6498 from aerosta/fix/pareto-front-warning-message
• 535215b Merge pull request #6502 from nightcityblade/fix/issue-6029-patient-pruner
• Additional commits viewable in compare view