docs(ci): add Codacy badge and integration guidance

[rmems]

User description

Summary

• add the official Codacy Grade badge to the README
• document the distinction between Codacy GitHub App analysis and the optional LCOV upload
• record the provider-sync recovery path for a missing Codacy commit

Validation

• git diff --check
• verified the Codacy badge and dashboard endpoints return HTTP 200

Scope

Documentation only. This PR does not change coverage generation, CI gates, provider credentials, or Codacy quality settings.

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CodeAnt-AI Description

Document Codacy coverage and analysis integrations

What Changed

• Adds a Codacy quality badge to the README that links to the project dashboard
• Explains that Codacy GitHub analysis and optional coverage uploads are separate integrations
• Documents how administrators can resynchronize the repository with Codacy when commits cannot be found
• Clarifies where the Codacy project token must be stored and that it must not be exposed in repository content

Impact

✅ Visible Codacy quality status
✅ Clearer coverage and analysis setup
✅ Faster recovery from missing Codacy commits

💡 Usage Guide

Checking Your Pull Request

Every time you make a pull request, our system automatically looks through it. We check for security issues, mistakes in how you're setting up your infrastructure, and common code problems. We do this to make sure your changes are solid and won't cause any trouble later.

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Example

@codeant-ai: Do not flag unused imports.

Retrigger review

Ask CodeAnt AI to review the PR again, by typing:

@codeant-ai: review

Check Your Repository Health

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Summary by cubic

Documents the Codacy integration and adds its quality badge to the README. This is documentation only; it does not alter coverage generation, CI gates, or Codacy settings.

• Clarifies that Codacy's GitHub App analysis and the optional lcov.info upload are independent integrations, with the upload gated on the CODACY_PROJECT_TOKEN secret.
• Records the provider-sync recovery step when Codacy can't find a commit after a repository rename or visibility change.

^{Written for commit 2d9d275. Summary will update on new commits.}

[codeant-ai]

🤖 CodeAnt AI — Review Status

Status	Commit	Started (UTC)	Finished (UTC)
✅ Reviewed your PR	365819a	Sep 18, 2026 · 03:15	03:16

[codeant-ai]

---

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[deepsource-io]

DeepSource Code Review

We reviewed changes in 13cfc2f...2d9d275 on this pull request. Below is the summary for the review, and you can see the individual issues we found as inline review comments.

See full review on DeepSource ↗

PR Report Card

Overall Grade

Security   Reliability   Complexity   Hygiene

Code Review Summary

Analyzer	Status	Updated (UTC)	Details
Rust		Sep 18, 2026 3:21a.m.	Review ↗
Secrets		Sep 18, 2026 3:21a.m.	Review ↗

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Important

AI Review is run only on demand for your team. We're only showing results of static analysis review right now. To trigger AI Review, comment @deepsourcebot review on this thread.

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-18T03:19:48.358481Z	2d9d275	New commits
🔒 Security Review	✅ Completed 2026-09-18T03:17:29.146349Z	365819a	PR opened

ℹ️ About Codex in GitHub

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• Mark a draft as ready
• Comment "@codex review" or "@codex security review".

Codex reacts with 👀 while any review is running, comments if it has suggestions, and reacts with 👍 once all reviews finish with no findings.

[coderabbitai]

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Review configuration:

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Essentials

Run ID: 75b9124e-acb9-47cb-bff0-ca736cb9a907

📥 Commits

Reviewing files that changed from the base of the PR and between 13cfc2f and 2d9d275.

📒 Files selected for processing (2)

• .github/coverage-integrations.md
• README.md

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

[amazon-q-developer]

Documentation-only changes approved. The Codacy badge addition and integration guidance are correct and provide clear operational value. No blocking issues identified.

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You can now have the agent implement changes and create commits directly on your pull request's source branch. Simply comment with /q followed by your request in natural language to ask the agent to make changes.

[codacy-production]

Up to standards ✅

🟢 Issues 0 issues

Results:
0 new issues

View in Codacy

_{NEW Get contextual insights on your PRs based on Codacy's metrics, along with PR and Jira context, without leaving GitHub. Enable AI reviewer
TIP This summary will be updated as you push new changes.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

📢 Thoughts on this report? Let us know!

[linear-code]

LIM-1374