ci(workflows): update Codecov action to v5 and upload test results

[ozeranskii]

Replace the deprecated test-results action with the official Codecov v5 action and explicitly pass the generated JUnit file and report type. This ensures test results are correctly uploaded to Codecov with the newer, maintained action and clearer input configuration.

Improves CI reliability and keeps build workflow compatible with current Codecov tooling.

Description

Fixes # (issue number, if applicable)

Type of Change

• 🐛 Bug fix (non-breaking change that fixes an issue)
• ✨ New feature (non-breaking change that adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📚 Documentation update
• 🎨 Code style/refactoring (no functional changes)
• ⚡ Performance improvement
• ✅ Test improvements
• 🔧 Build/CI/tooling changes

Changes Made

Testing

Test environment:

• OS:
• Python version:
• httptap version:

Tests performed:

• Ran existing test suite: uv run pytest
• Added new tests for new functionality
• Manually tested with: httptap <command>
• Tested on multiple OS (if applicable): Linux / macOS / Windows

Test commands:

# Example commands used to verify the changes
httptap https://httpbin.io/get

Expected behavior:

Actual behavior:

Screenshots/Output

# Paste sample output here

Checklist

• My code follows the Google Python Style Guide
• I have run uv run ruff check . and uv run ruff format .
• I have run uv run mypy httptap and resolved type errors
• I have added tests that prove my fix is effective or that my feature works
• All tests pass locally: uv run pytest
• I have updated the documentation (if applicable)
• I have added docstrings to new functions/classes
• My changes don't introduce new dependencies (or I've justified them)
• I have checked that my changes work on multiple platforms (if applicable)

Breaking Changes

Impact:

Migration:

Additional Context

---

For Maintainers:

• Code review completed
• Tests verified
• Documentation reviewed
• Ready to merge

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (84873f5) to head (5ae4bdd).
⚠️ Report is 1 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@            Coverage Diff            @@
##              main       #74   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           19        19           
  Lines         1236      1236           
  Branches       148       148           
=========================================
  Hits          1236      1236           

Flag	Coverage Δ
unittests	100.00% <ø> (ø)

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
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