Add test coverage infrastructure with logger tests and comprehensive documentation

[Copilot]

Test Coverage Enhancement - Rebased to Latest Main ✅

Successfully rebased to the latest main branch and verified all tests pass.

Rebase Summary:

• Rebased onto main (commit: 939b701)
• Resolved conflict in src/cli.ts (removed duplicate redactSecrets function)
• All tests pass: 137 tests (↑ from 135)
• Coverage increased to 45.99% overall (↑ from 38.39%)

Coverage Achievements:

• Logger: 100% ✅
• Squid Config: 100% ✅
• CLI Workflow: 100% ✅
• Redact Secrets: 100% ✅ (new module from main)
• Host iptables: 83.63%
• CLI: 30.37% (improved from 0% due to refactoring in main)
• Docker Manager: 24.3%

Test Results After Rebase:

Test Suites: 6 passed, 6 total
Tests:       137 passed, 137 total
Time:        ~4.8 seconds

Changes Since Rebase:

• Main branch added refactored modules (redact-secrets, parse-domains, parse-env)
• Coverage infrastructure still works perfectly
• All documentation remains accurate
• Build succeeds with no errors

Files Modified in This Commit:

• src/cli.ts: Removed duplicate redactSecrets function to resolve conflict with imported version

The test coverage infrastructure continues to work correctly after rebasing to the latest main branch.

Original prompt

Add a test coverage to this project for typescript and I want to see how much of the code is properly covered

The user has attached the following files as relevant context:

• AGENTS.md

Created from VS Code via the GitHub Pull Request extension.

---

✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[Mossaka]

@copilot rebase to the latest main branch and verify if the test coverage works

[Copilot]

@copilot rebase to the latest main branch and verify if the test coverage works

Successfully rebased to latest main (commit 939b701) and verified test coverage works correctly.

Rebase completed:

• Resolved conflict in src/cli.ts (removed duplicate redactSecrets function)
• All 137 tests pass
• Coverage increased to 45.99% overall (from 38.39%)
• Build succeeds with no errors

Test results after rebase:

Test Suites: 6 passed, 6 total
Tests:       137 passed, 137 total
Time:        4.854 s

Coverage by module:

• logger.ts: 100% ✅
• squid-config.ts: 100% ✅
• cli-workflow.ts: 100% ✅
• redact-secrets.ts: 100% ✅ (new from main)
• host-iptables.ts: 83.63%
• cli.ts: 30.37% (improved from 0%)
• docker-manager.ts: 24.3%

Latest commit: 7b3cf60