chore(deps): bump google-genai from 1.69.0 to 1.73.1 in /application

Bumps [google-genai](https://github.com/googleapis/python-genai) from 1.69.0 to 1.73.1.
- [Release notes](https://github.com/googleapis/python-genai/releases)
- [Changelog](https://github.com/googleapis/python-genai/blob/main/CHANGELOG.md)
- [Commits](https://github.com/googleapis/python-genai/compare/v1.69.0...v1.73.1)

---
updated-dependencies:
- dependency-name: google-genai
  dependency-version: 1.73.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

application/requirements.txt

@@ -18,7 +18,7 @@ Flask==3.1.3
 faiss-cpu==1.13.2
 fastmcp==3.2.4
 flask-restx==1.3.2
-google-genai==1.69.0
+google-genai==1.73.1
 google-api-python-client==2.193.0
 google-auth-httplib2==0.3.1
 google-auth-oauthlib==1.3.1