fix: 修复缓存 token usage 转换语义

统一 OpenAI、Gemini、Claude 之间缓存 token 的 usage 语义，避免 Claude 侧重复统计缓存输入 token。同时补充 stream 合并逻辑、字段注释和覆盖转换链路的测试。
2026-10-12 20:19:51 +08:00 · 2026-05-27 23:49:07 +08:00
parent 14ad6e9b75
commit 739e39e1ca
9 changed files with 274 additions and 64 deletions
@@ -2824,6 +2824,7 @@ mod tests {
        .expect("usage should parse");

        assert_eq!(usage.input_tokens, 20_435);
+        assert!(usage.input_tokens_include_cache);
        assert_eq!(usage.output_tokens, 177);
        assert_eq!(usage.cache_read_tokens, 19_840);
        assert_eq!(usage.reasoning_tokens, 7);
@@ -3734,6 +3735,7 @@ mod tests {
                        finish_reason: Some("stop".to_string()),
                        usage: Some(CanonicalUsage {
                            input_tokens: 1,
+                            input_tokens_include_cache: true,
                            output_tokens: 2,
                            total_tokens: 3,
                            cache_creation_tokens: 5,