build(deps): bump the pip-minor-patch group across 1 directory with 7 updates

---
updated-dependencies:
- dependency-name: fastapi
  dependency-version: 0.162.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: pip-minor-patch
- dependency-name: sqlalchemy
  dependency-version: 2.1.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: pip-minor-patch
- dependency-name: alembic
  dependency-version: 1.20.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: pip-minor-patch
- dependency-name: pydantic
  dependency-version: 2.14.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: pip-minor-patch
- dependency-name: pydantic-settings
  dependency-version: 2.16.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: pip-minor-patch
- dependency-name: pytest
  dependency-version: 9.2.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: pip-minor-patch
- dependency-name: pytest-asyncio
  dependency-version: 1.4.1
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: pip-minor-patch
...

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

backend/requirements-dev.txt

@@ -3,6 +3,6 @@
 # backend container (see backend/tests/README.md) rather than baking these
 # into the Docker image.
 -r requirements.txt
-pytest==9.1.1
+pytest==9.2.0
-pytest-asyncio==1.4.0
+pytest-asyncio==1.4.1
 httpx==0.28.1

backend/requirements.txt

@@ -1,9 +1,9 @@
-fastapi==0.146.0
+fastapi==0.162.0
 uvicorn[standard]==0.54.0
-sqlalchemy[asyncio]==2.1.5
+sqlalchemy[asyncio]==2.1.6
 asyncpg==0.32.0
-alembic==1.20.0
+alembic==1.20.1
-pydantic==2.14.1
+pydantic==2.14.2
-pydantic-settings==2.16.0
+pydantic-settings==2.16.2
 python-dotenv==1.2.4
 httpx==0.28.1