Bump the python-dependencies group with 7 updates

[dependabot]

For context: we now have a Dependabot config file. It uses the default branch, so this was added directly to main. This then produced 25-odd updates, most of which were harmless and were merged in. The ones below needed code changes.

For reference ,this is how Dependabot works for updates and vulnerabilities:

Type	Trigger	Creates PRs?	Controlled by
Version Updates	New package versions available	Yes	.github/dependabot.yml
Security Updates	Known vulnerability (CVE/GHSA) detected	Yes	Security settings.

During testing of the FastAPI dependency updates, the API began returning HTTP 500 responses from the /login endpoint. Turns out the issue was the Elastic APM middleware. Temporarily disabling:

app.add_middleware(ElasticAPM, client=apm)

immediately fixed the issue.

To restore functionality, FastAPI and Starlette have been pinned to the last known working versions

Other changes include linting fixes due to the bump in Flake version.

Other Updates:

Package	From	To
flake8	5.0.4	7.3.0
flake8-bugbear	22.12.6	25.11.29
flake8-builtins	1.5.3	3.1.0
pep8-naming	0.12.1	0.15.1
pytest-cov	5.0.0	7.1.0

[codecov]

Codecov Report

❌ Patch coverage is 80.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 96.91%. Comparing base (29c34fa) to head (1d62913).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
operationsgateway_api/src/routes/export.py	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #262   +/-   ##
=======================================
  Coverage   96.91%   96.91%           
=======================================
  Files          88       88           
  Lines        4928     4928           
  Branches      436      436           
=======================================
  Hits         4776     4776           
  Misses        104      104           
  Partials       48       48           

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[dependabot]

Looks like these dependencies are updatable in another way, so this is no longer needed.