Ruff format

[ialarmedalien]

Run ruff format on the codebase.

Update the main.yaml workflow to prevent tests from being run if the code QC fails.

This PR should be reviewed after #403 is merged as the first two commits are from that PR. Unfortunately I don't have write perms so can't create a branch and choose #403 to merge into.

[codecov]

Codecov Report

Attention: Patch coverage is 52.73973% with 276 lines in your changes missing coverage. Please review.

Project coverage is 64.45%. Comparing base (faac277) to head (7615438).

Files with missing lines	Patch %	Lines
linkml_runtime/linkml_model/datasets.py	0.00%	86 Missing ⚠️
linkml_runtime/linkml_model/validation.py	0.00%	26 Missing ⚠️
linkml_runtime/utils/schemaview_cli.py	0.00%	22 Missing ⚠️
linkml_runtime/linkml_model/mappings.py	0.00%	15 Missing ⚠️
linkml_runtime/utils/namespaces.py	51.85%	10 Missing and 3 partials ⚠️
linkml_runtime/processing/referencevalidator.py	72.72%	10 Missing and 2 partials ⚠️
linkml_runtime/utils/yamlutils.py	72.22%	9 Missing and 1 partial ⚠️
linkml_runtime/loaders/loader_root.py	55.55%	7 Missing and 1 partial ⚠️
linkml_runtime/processing/validation_datamodel.py	57.89%	5 Missing and 3 partials ⚠️
linkml_runtime/utils/metamodelcore.py	55.55%	7 Missing and 1 partial ⚠️
... and 18 more

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #404   +/-   ##
=======================================
  Coverage   64.45%   64.45%           
=======================================
  Files          62       62           
  Lines        8846     8846           
  Branches     2556     2556           
=======================================
  Hits         5702     5702           
  Misses       2535     2535           
  Partials      609      609           

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