docs: add README metrics table

[CoreyLeath-code]

Summary

• Replaces placeholder README metrics sections with repository-derived metrics.
• Adds operational metrics tied to the existing LogSight analyzer functions and documented defaults.
• Preserves the existing architecture and benchmark narrative below the new tables.

Validation

• pytest --basetemp=.pytest-tmp/run --cov=logsight --cov-report=term-missing
  • 34 passed
  • 80% package coverage
• Repository counts measured from git ls-files on 2026-07-12.

Notes

• Ruff is configured in the repo, but a local audit currently reports existing style/import cleanup candidates in support scripts. I did not mark lint as passing in the README metrics table.

Summary by CodeRabbit

• Documentation
  • Updated metrics documentation with concrete repository measurements, including files, code size, modules, tests, coverage, workflows, dependencies, and documentation.
  • Added operational metric definitions and thresholds for error rates, recurring messages, anomalies, and activity spikes.
  • Replaced placeholder-based performance, testing, and engineering metrics sections with actionable information.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 398e274f-76e9-4f03-ab86-1f6bd24fcff1

📥 Commits

Reviewing files that changed from the base of the PR and between 5b95b2b and 16608a8.

📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

README metrics documentation now contains concrete repository measurements and operational metric definitions, replacing placeholder model, performance, testing, and engineering metrics sections.

Changes

Metrics documentation

Layer / File(s)	Summary
Repository and operational metrics README.md	Replaces placeholder metrics with measured repository counts and runtime metric definitions, formulas, and thresholds.

Estimated code review effort: 1 (Trivial) | ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly matches the README documentation update and the new metrics content.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/add-readme-metrics-table

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