chore(ci): remove dead Codecov upload steps + lock pins

[hyperpolymath]

Removed CI references to apps that are no longer installed on this account/org.

Why this is a fix, not a tidy-up

• Codecov was uninstalled as a GitHub App, but its action steps remain in workflows.
• The estate Actions allowlist already pruned codecov/codecov-action@* (standards/config/settings/actions-allowlist.json -> pruned_from_live_2026_09_02), so a workflow still calling it fails at job start instead of quietly no-op-ing.
• Snyk / Codacy / Mergify / ImgBot / CodeFactor are on the estate never-re-add list (standards spec §9, rulings R1/R4/R5).

Changes

• .github/workflows/ci.yml — applied

Notes

• actions.lock entries for the removed actions are deleted in this same commit (the same-PR regen rule in the CI/CD regularisation spec §6.4), so actions-lock-verify sees no drift.
• Removals are line-exact; no other line was reformatted and no comment was re-wrapped.
• Historical records (milestone logs, CHANGELOG, audit docs, specs) that describe the removal were deliberately left untouched.
• The gitar-approved label is intentionally frozen per docs/LABELS.adoc — it is not an active Gitar install, so it stays.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Advanced

Run ID: 267fee9b-5a4b-42a6-b21d-8ee1b23881ac

📥 Commits

Reviewing files that changed from the base of the PR and between 1fac5b8 and 5634212.

📒 Files selected for processing (1)

• .github/workflows/ci.yml

💤 Files with no reviewable changes (1)

• .github/workflows/ci.yml

Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review.

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📝 Summary

Summary by CodeRabbit

• Chores
  • Coverage results are no longer uploaded to Codecov as part of the continuous integration workflow.

Walkthrough

The CI test job no longer uploads coverage.xml to Codecov. The pytest step remains unchanged.

Changes

CI coverage handling

Layer / File(s)	Summary
Remove Codecov upload .github/workflows/ci.yml	The test job no longer runs codecov/codecov-action after pytest.

Priority: ⬇️ Low

Estimated code review effort: 1 (Trivial) | ~3 minutes

Change: Bug fix

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description explains the Codecov removal and gives useful implementation context. However, it omits most required template sections, including Type of Change, Related Issues, Testing, Checklists, …	Update the description to follow the repository template. Include the relevant change type, issue reference or an explicit no-issue statement, testing performed and results, checklist status, performance impact, breaking-change assessment, …

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the main change: removing obsolete Codecov CI steps and related lock pins.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

Full details: Description check

Explanation

The description explains the Codecov removal and gives useful implementation context. However, it omits most required template sections, including Type of Change, Related Issues, Testing, Checklists, Performance Impact, Breaking Changes, and Reviewer Checklist.

Resolution

Update the description to follow the repository template. Include the relevant change type, issue reference or an explicit no-issue statement, testing performed and results, checklist status, performance impact, breaking-change assessment, security and compliance confirmations, and any applicable screenshots or output.

• Fix all pre-merge checks with AI

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_{A rabbit checks the test run bright
No coverage upload hops tonight
Pytest still completes its course
The workflow follows a simpler source
Ears up for green checks in sight}

_{Comment @coderabbitai help to get the list of available commands.}

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud