fix: warn instead of blocking when configured model not in hardcoded list

[Blueteemo]

修复内容

将 MiniMax Token Plan Provider 中，不在硬编码白名单里的模型从 ValueError 强行阻断改为 logger.warning 警告。

原因： Plus 用户（如 MiniMax-M2.7-highspeed）被硬编码白名单阻断无法使用，但实际上 Plus plan 确实支持这些模型。

改动：

• 移除 raise ValueError
• 改为 logger.warning 提示用户模型可能不受支持，但仍允许配置

背景

由用户反馈驱动：#7609 (comment)

Summary by Sourcery

Allow MiniMax token plan to accept configured models outside the hardcoded list while logging a warning instead of blocking.

Bug Fixes:

• Permit Plus users to use additional MiniMax models that were previously blocked by a hardcoded whitelist despite being supported by their plan.

Enhancements:

• Extend the known MiniMax token plan model list to include additional highspeed variants for better default compatibility.

[sourcery-ai]

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[gemini-code-assist]

Code Review

This pull request modifies the MiniMax token plan source to log a warning instead of raising an exception when an unrecognized model is used, allowing for greater flexibility. Feedback suggests using the centralized logger from the astrbot package for consistency and considering refactoring to minimize code duplication with similar providers.

[zouyonghe]

@sourcery-ai review

[sourcery-ai]

Hey - I've reviewed your changes and they look great!

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