Merge branch 'tidy-optional-deps' into 'v3'

Tidy optional deps

See merge request openflexure/openflexure-microscope-server!480

.gitlab-ci.yml

@@ -118,7 +118,6 @@ pytest:
   script:
     - pytest
     - mv .coverage .coverage.main
-#    --gitlab-code-quality-report=pytest-warnings.json # can restore when it installs ok
   artifacts:
     when: always
     paths:

pyproject.toml

@@ -35,9 +35,8 @@ dependencies = [
 
 [project.optional-dependencies]
 dev = [
-  "ruff~=0.13.0",
+  "ruff~=0.15.1",
   "mypy[reports]",
-#  "pytest-gitlab-code-quality", # pytest version constraint clashes with labthings
   "pytest",
   "pytest-cov",
   "pytest-mock==3.14",