[Bug] Anthropic API Error: Reasoning Extraction False Positives in Extended Sessions

**Bug Description**
"관측용 기술조사 세션에서 [reasoning_extraction] 연쇄 오탐" Request ID: req_011CeDop1tgtMDVEnoJytNt5, req_011CeDomHsnkYmAgmdum19Lx, req_011CeDogDxFdWeYuxwek6x2r, req_011CeDoeYvU1o8Lw8QJcKxNF, req_011CeDocLDRuGqM5LDuJmgri, req_011CeDoaKQWNBrTvSixLf8R3, req_011CeDoUDMD6kkvNrYjKSMBa, req_011CeDoRAyzPpAinkLcTq2rW, req_011CeDoJTrJfNX4sYyC3grqR, req_011CeDnYeptF65cK2iqLGRHR, req_011CeDnRuRmwt513hHxSVZG7, req_011CeDnNxbSMiZeRwVbUMhrH, req_011CeDkzXVbtzArWRKMrVtXm, req_011CeDkjpBGxcPVjN7wsj8tC, req_011CeDfYAdg7Ki6yfGfDpMHh, req_011CeDfnST4vAUKY9FG2ZBCc,

**Environment Info**
- Platform: win32
- Terminal: null
- Version: 2.1.237
- Feedback ID: b8c6a7f2-15ce-4913-aa89-bacb194c3727

**Errors**
```json
[]
```

Start by reproducing the reported reasoning_extraction false positives on win32 with version 2.1.237, using the listed request IDs and feedback ID as investigation references. The report names no files, tests, or entry points; completion would require identifying why extended sessions trigger false positives and verifying that the behavior no longer occurs.

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