⬆ Bump pydantic-settings from 2.5.2 to 2.9.1 in /backend (#1589)

Bumps [pydantic-settings](https://github.com/pydantic/pydantic-settings) from 2.5.2 to 2.9.1.
- [Release notes](https://github.com/pydantic/pydantic-settings/releases)
- [Commits](https://github.com/pydantic/pydantic-settings/compare/v2.5.2...v2.9.1)

---
updated-dependencies:
- dependency-name: pydantic-settings
  dependency-version: 2.9.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

backend/uv.lock

@@ -1015,15 +1015,16 @@ wheels = [
 
 [[package]]
 name = "pydantic-settings"
-version = "2.5.2"
+version = "2.9.1"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "pydantic" },
     { name = "python-dotenv" },
+    { name = "typing-inspection" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/68/27/0bed9dd26b93328b60a1402febc780e7be72b42847fa8b5c94b7d0aeb6d1/pydantic_settings-2.5.2.tar.gz", hash = "sha256:f90b139682bee4d2065273d5185d71d37ea46cfe57e1b5ae184fc6a0b2484ca0", size = 70938 }
+sdist = { url = "https://files.pythonhosted.org/packages/67/1d/42628a2c33e93f8e9acbde0d5d735fa0850f3e6a2f8cb1eb6c40b9a732ac/pydantic_settings-2.9.1.tar.gz", hash = "sha256:c509bf79d27563add44e8446233359004ed85066cd096d8b510f715e6ef5d268", size = 163234 }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/29/8d/29e82e333f32d9e2051c10764b906c2a6cd140992910b5f49762790911ba/pydantic_settings-2.5.2-py3-none-any.whl", hash = "sha256:2c912e55fd5794a59bf8c832b9de832dcfdf4778d79ff79b708744eed499a907", size = 26864 },
+    { url = "https://files.pythonhosted.org/packages/b6/5f/d6d641b490fd3ec2c4c13b4244d68deea3a1b970a97be64f34fb5504ff72/pydantic_settings-2.9.1-py3-none-any.whl", hash = "sha256:59b4f431b1defb26fe620c71a7d3968a710d719f5f4cdbbdb7926edeb770f6ef", size = 44356 },
 ]
 
 [[package]]
@@ -1346,6 +1347,18 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/26/9f/ad63fc0248c5379346306f8668cda6e2e2e9c95e01216d2b8ffd9ff037d0/typing_extensions-4.12.2-py3-none-any.whl", hash = "sha256:04e5ca0351e0f3f85c6853954072df659d0d13fac324d0072316b67d7794700d", size = 37438 },
 ]
 
+[[package]]
+name = "typing-inspection"
+version = "0.4.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "typing-extensions" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/82/5c/e6082df02e215b846b4b8c0b887a64d7d08ffaba30605502639d44c06b82/typing_inspection-0.4.0.tar.gz", hash = "sha256:9765c87de36671694a67904bf2c96e395be9c6439bb6c87b5142569dcdd65122", size = 76222 }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/31/08/aa4fdfb71f7de5176385bd9e90852eaf6b5d622735020ad600f2bab54385/typing_inspection-0.4.0-py3-none-any.whl", hash = "sha256:50e72559fcd2a6367a19f7a7e610e6afcb9fac940c650290eed893d61386832f", size = 14125 },
+]
+
 [[package]]
 name = "tzdata"
 version = "2024.1"