Observe request summary, size, and duration with labels (Kinto#3461)

* Send metrics to count endpoints with method and status

* Report request size

* Observe request duration

* Add generic labels on metrics using request matchdict fields

* Reinitialize metrics on plugin initialize to ease testing

* Fix docstring

* Add missing method

* Fix crash in response callback when path is invalid unicode

Add prometheus support (Fixes Kinto#3407) (Kinto#3453)

* Introduce the Prometheus lib

* Start plugin

* Unit testing

* Adapt usage of unique parameter to groups

* Skip test when no prometheus installed

* Add test for events

* Enable Prometheus in functional test

* Add section about Prometheus

* Move plugins section above monitoring

* Fix link format in docs

* Remove TODO

* nit docs

Fix Kinto#3402: Prevent invalid timestamps to reach the database (Kin…

…to#3425)

Bump the minor-patch group with 3 updates (Kinto#3397)

Bumps the minor-patch group with 3 updates: [sqlalchemy](https://github.com/sqlalchemy/sqlalchemy), [newrelic](https://github.com/newrelic/newrelic-python-agent) and [ruff](https://github.com/astral-sh/ruff).


Updates `sqlalchemy` from 2.0.25 to 2.0.28
- [Release notes](https://github.com/sqlalchemy/sqlalchemy/releases)
- [Changelog](https://github.com/sqlalchemy/sqlalchemy/blob/main/CHANGES.rst)
- [Commits](https://github.com/sqlalchemy/sqlalchemy/commits)

Updates `newrelic` from 9.7.0 to 9.7.1
- [Release notes](https://github.com/newrelic/newrelic-python-agent/releases)
- [Commits](newrelic/newrelic-python-agent@v9.7.0...v9.7.1)

Updates `ruff` from 0.3.2 to 0.3.3
- [Release notes](https://github.com/astral-sh/ruff/releases)
- [Changelog](https://github.com/astral-sh/ruff/blob/main/CHANGELOG.md)
- [Commits](astral-sh/ruff@v0.3.2...v0.3.3)

---
updated-dependencies:
- dependency-name: sqlalchemy
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: minor-patch
- dependency-name: newrelic
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: minor-patch
- dependency-name: ruff
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: minor-patch
...

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

Read admin assets version from configured folder (Kinto#3376)

Do not install dev dependencies in Docker image (Kinto#3369)

* Do not install dev dependencies in Docker image

* Rename requirements.txt as constraints.txt

* Fix docs install

test2

test1