chore: bump version to 4.26.8

[Soulter]

Summary

• bump the project and package versions from 4.26.7 to 4.26.8
• add polished English and Chinese release notes for changes since v4.26.7
• prepare the required release branch for review before tagging

Why

This prepares the 4.26.8 patch release using the repository's documented release workflow.

Impact

After this PR is merged, master will report version 4.26.8 and can be tagged as v4.26.8.

Validation

• uv run python scripts/prepare_release.py 4.26.8
• uv run ruff format .
• uv run ruff check .
• git diff --check

Summary by Sourcery

Prepare the 4.26.8 patch release by updating version metadata and adding release notes.

New Features:

• Document new per-plugin log level controls and FishAudio TTS model configuration support introduced in 4.26.8.

Bug Fixes:

• Document multiple fixes across FAISS indexing, cron scheduler persistence, LLM checkpointing and embeddings, content safety handling, third-party integrations, UI behavior, and C extension reload stability included in 4.26.8.

Enhancements:

• Document behavioral changes such as honoring partial reply quotes, non-blocking CPU usage reporting, and default mappings for dictionary configuration fields in 4.26.8.

CI:

• Record maintenance updates to grouped GitHub Actions dependencies and docker/login-action for this release.

Documentation:

• Add English and Chinese changelog entries for version 4.26.8, including documentation updates and a new Windows Docker Desktop deployment guide.

Tests:

• Note maintenance of updater path tests to avoid creating stray directories as part of the 4.26.8 release changes.

Chores:

• Bump the project version from 4.26.7 to 4.26.8 in code and packaging metadata and pin Ruff to version 0.15.22.

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Status	Name	Latest Commit	Preview URL	Updated (UTC)
✅ Deployment successful! View logs	astrbot-docs	44e514f	Commit Preview URL Branch Preview URL	Jul 28 2026, 02:09 PM