v0.5.0

Foundational release establishing the CI/CD pipeline, Python tooling, and code quality infrastructure that all subsequent milestones depend on.

Key deliverables:
• Release automation — fix release-please tag creation guard (#174), remove harden-runner from workflows (#137)
• Python dependency rationalization — eliminate sys.path hacks via editable installs (#191), rationalize legacy requirements.txt files (#189), add per-workflow Dependabot entries (#190)
• Unified code coverage — Codecov integration (#422), Python CI upload (#423), codecov.yml config (#424), pyproject.toml coverage settings (#425), Pester threshold alignment (#426), orchestrator workflow updates (#427)
• Security scanning — Bandit static analysis workflow (#88), dependency-review GHSA allowlist audit (#310)
• Documentation tooling — automated ms.date freshness checking (#164)
• Platform fixes — devcontainer missing dependency (#179), NAT Gateway availability zone support (#182)
• Isaac Sim 5.x upgrade to fix env.close() shutdown hang (#374)
• PowerShell CI helpers — Test-PowerShellVersion and null-guards (#337)
• HVE-Core workflow migration tracking (#52)