chore: bump version to 0.5.0

[qjrm1430]

🚀 PR Type (Required)

Select one and delete the others:

• 🎯 Ready for Review - All quality checks passed, ready for merge
• 🔄 Draft/WIP - Early feedback welcome (tests/docs may be incomplete)
• ⚡ Quick Fix - Urgent fix requiring expedited review

Proact0 Culture: We value early collaboration! Draft PRs are encouraged for complex changes.

---

📝 Summary

📄 Description

🔗 Issue / Dependencies / Mentions

• Issue:
• Dependencies:
• SNS handle:

💪 Ownership (Required)

• Hand-raise: I will monitor the impact of this change and take responsibility for follow-up issues

Extreme Ownership: At Proact0, we track not just code changes, but their impact on team productivity.

✅ Quality Checks (Required for "Ready for Review" only)

• uv run ruff check . passed
• uv run pytest -q passed

Draft/WIP PRs: Skip quality checks for early feedback - just mark as Draft!

💡 Notes (Optional)

🔗 Related Issue(s)