chore(deps): update tenacity requirement from >=8.2.0 to >=9.1.4

Updates the requirements on [tenacity](https://github.com/jd/tenacity) to permit the latest version.
- [Release notes](https://github.com/jd/tenacity/releases)
- [Commits](jd/tenacity@8.2.0...9.1.4)

---
updated-dependencies:
- dependency-name: tenacity
  dependency-version: 9.1.4
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements.txt

@@ -7,7 +7,7 @@ scipy>=1.7.0
 loguru>=0.7.0
 pydantic>=2.0.0
 python-dotenv>=1.2.2
-tenacity>=8.2.0
+tenacity>=9.1.4
 
 # Optional AI provider support (installed via extras_require)
 # openai>=1.0.0