release(langchain): 1.2.17

[Sydney Runkle (sydney-runkle)]

Bumps langchain from 1.2.16 → 1.2.17.

Picks up:

• respond decision added to HITL middleware (feat(langchain): add respond decision to HITL middleware #37095)

This PR was opened with AI-agent assistance.

[codspeed-hq]

Merging this PR will not alter performance

✅ 2 untouched benchmarks
⏩ 13 skipped benchmarks¹

---

_{Comparing sr/new-release-for-hitl (aeac607) with master (a1f336f)²}

Footnotes

1. 13 benchmarks were skipped, so the baseline results were used instead. If they were deleted from the codebase, click here and archive them to remove them from the performance reports. ↩

2. No successful run was found on master (04e7a55) during the generation of this report, so a1f336f was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩