fix: enable release-it ci jobs

See merge request !8

Updates the public release job to refer to the base job's before_script
rather than repeating its contents.

Updates comments in CI pipeline to include reference to variable
precedence.

Updates versions of dependent CI files to latest (4.5.1).

Updates gitlab pipelines to disable the attempted python package
publishing (which is not suitable for this project), and ensure the
public artifact registry push sends the image to the correct repository.

Add public release to repository

See merge request !7

Adds a gitlab job, based off the existing release job to release to the
public docker repository in the GCP artifact registry. This job runs on
tag pipelines only.

Adds release-it to the repository, following webapp boilerplate
settings.

Add CORS

See merge request !6

Correct gitlab script for tag pipelines

See merge request !4

Default updates and comments

See merge request !3

Add security tweaks to server

See merge request !2

Adds proxy headers middleware to server, to ensure that when behind the
GCP load balancer the server can be configured to correctly limit based
on the actual client remote address.

Adds an internal rate limiter using the slowapi python module. This rate
limiter is used to set a per-client rate per minute and a global rate
per day. These are configured via pytest-settings.

Adds a client id header check to the /log endpoint to defend against
automated script probing.

Adds a stress test configuration via pytest & docker compose to make a
lot of concurrent calls to the server.

Add /log endpoint to accept logs

Closes #1

See merge request !1