ci(coverage): adding mandatory 80% level of coverage for diff (#239)

[guzmud]

Proposed changes

• Adding mandatory 80% level of coverage for diff
• Adding export and upload of junit.xml
• More details regarding quality control in CONTRIBUTING.md

Testing Instructions

1. Run the CI pipeline

Related issues

• Closes test: ensure minimum coverage level for new code #239

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality
• For bug fix -> I implemented a test that covers the bug

[codecov]

❌ 2 Tests Failed:

Tests completed	Failed	Passed	Skipped
131	2	129	0

View the top 2 failed test(s) by shortest run time

test.daemons.test_base_daemon.TestBaseDaemon::test_when_no_callback_daemon_cant_start

Stack Traces | 0.002s run time

self = <test.daemons.test_base_daemon.TestBaseDaemon testMethod=test_when_no_callback_daemon_cant_start>

    def test_when_no_callback_daemon_cant_start(self):
        daemon, mock_setup, mock_start_loop, _ = create_mock_daemon()
    
        with self.assertRaises(OpenAEVError):
>           daemon.start()

test/daemons/test_base_daemon.py:68: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
pyoaev/daemons/base_daemon.py:109: in start
    args = parser.parse_args()
           ^^^^^^^^^^^^^^^^^^^
........./usr/lib/python3.12/argparse.py:1911: in parse_args
    self.error(msg % ' '.join(argv))
........./usr/lib/python3.12/argparse.py:2677: in error
    self.exit(2, _('%(prog)s: error: %(message)s\n') % args)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

    def exit(self, status=0, message=None):
        if message:
            self._print_message(message, _sys.stderr)
>       _sys.exit(status)
E       SystemExit: 2

........./usr/lib/python3.12/argparse.py:2664: SystemExit

test.daemons.test_base_daemon.TestBaseDaemon::test_when_callback_daemon_can_start

Stack Traces | 0.004s run time

self = <test.daemons.test_base_daemon.TestBaseDaemon testMethod=test_when_callback_daemon_can_start>

    def test_when_callback_daemon_can_start(self):
        daemon, mock_setup, mock_start_loop, _ = create_mock_daemon(lambda: None)
    
>       daemon.start()

test/daemons/test_base_daemon.py:76: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
pyoaev/daemons/base_daemon.py:109: in start
    args = parser.parse_args()
           ^^^^^^^^^^^^^^^^^^^
........./usr/lib/python3.12/argparse.py:1911: in parse_args
    self.error(msg % ' '.join(argv))
........./usr/lib/python3.12/argparse.py:2677: in error
    self.exit(2, _('%(prog)s: error: %(message)s\n') % args)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = ArgumentParser(prog='__main__.py', usage=None, description='parse daemon options', formatter_class=<class 'argparse.HelpFormatter'>, conflict_handler='error', add_help=True)
status = 2
message = '__main__.py: error: unrecognized arguments: --junitxml=junit.xml\n'

    def exit(self, status=0, message=None):
        if message:
            self._print_message(message, _sys.stderr)
>       _sys.exit(status)
E       SystemExit: 2

........./usr/lib/python3.12/argparse.py:2664: SystemExit

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[Copilot]

Pull request overview

This PR introduces Codecov configuration and CI workflow updates to enforce a minimum coverage threshold on new/changed code, publish test results, and document the project’s quality gates for contributors.

Changes:

• Add codecov.yml to enforce a patch (diff) coverage target of 80%.
• Update the coverage GitHub Actions workflow to generate junit.xml and upload test results to Codecov.
• Document CI quality checks and add junit.xml to .gitignore.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 4 comments.

File	Description
CONTRIBUTING.md	Documents CI code-quality and coverage expectations for contributors.
codecov.yml	Configures Codecov status checks (project informational, patch target 80%).
.gitignore	Ignores generated junit.xml.
.github/workflows/coverage.yml	Generates JUnit XML output and uploads coverage/test results to Codecov.

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[jabesq]

suggestion: If you want to enforce this score, it would be better to set fail-under setting inside pyproject.toml

[jabesq]

suggestion: This flags is not needed because everything is pyoaev in this repos