poetry: update aws-lambda-powertools requirement from ^2.26.0 to ^3.9.0

Updates the requirements on [aws-lambda-powertools](https://github.com/aws-powertools/powertools-lambda-python) to permit the latest version.
- [Release notes](https://github.com/aws-powertools/powertools-lambda-python/releases)
- [Changelog](https://github.com/aws-powertools/powertools-lambda-python/blob/develop/CHANGELOG.md)
- [Commits](aws-powertools/powertools-lambda-python@v2.26.0...v3.9.0)

---
updated-dependencies:
- dependency-name: aws-lambda-powertools
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pyproject.toml

@@ -18,7 +18,7 @@ python = "3.12.3"
 pydantic = "1.10.21"
 nhs-context-logging = "^0.6.8"
 requests = "^2.31.0"
-aws-lambda-powertools = "^2.26.0"
+aws-lambda-powertools = "^3.9.0"
 email-validator = "^2.1.0.post1"
 smart-open = "^7.0.1"
 urllib3 = "<3"
@@ -37,7 +37,7 @@ pytest-cov = "^6.0.0"
 pytest-custom-exit-code = "^0.3.0"
 sh = "^2.0.6"
 hypothesis = "^6.87.3"
-aws-lambda-powertools = { extras = ["aws-sdk"], version = "^2.26.0" }
+aws-lambda-powertools = { extras = ["aws-sdk"], version = "^3.9.0" }
 parse = "^1.19.1"
 pytest-mock = "^3.12.0"
 datamodel-code-generator = "^0.28.1"