refactor: 抽取统一计费模块，支持配置驱动的多厂商计费

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- 新增 src/services/billing/ 模块，包含计费计算器、模板和使用量映射
- 将 ChatAdapterBase 和 CliAdapterBase 中的计费逻辑重构为调用 billing 模块
- 为每个 adapter 添加 BILLING_TEMPLATE 类属性，指定计费模板
- 支持 Claude/OpenAI/Gemini 三种计费模板，支持阶梯计费和缓存 TTL 定价
- 新增 tests/services/billing/ 单元测试

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This commit is contained in:

fawney19

2026-01-05 16:48:59 +08:00

parent 465da6f818

commit 35e29d46bd

15 changed files with 1649 additions and 224 deletions

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tests/services/billing/__init__.py Normal file