Summary

Bumps the version in pyproject.toml and hermes_cli/__init__.py from 0.15.1 to 0.15.2 to match release tag v2026.5.29.2.

Problem

After release tag v2026.5.29.2 was created with version 0.15.2, the version on main was not updated — it remained at 0.15.1. This caused confusing behavior where:

1. hermes update pulls main which still reports 0.15.1
2. Users see "Update available: N commits behind — run hermes update"
3. Running hermes update does not resolve the version mismatch
4. The official GitHub release shows v0.15.2 but the CLI reports v0.15.1

Changes

Closes #38618

Verification

• Version bumped in pyproject.toml — used by pip/uv builds
• Version bumped in hermes_cli/__init__.py — displayed in CLI banner
• Release date matches the tag v2026.5.29.2
• Branch created, committed, pushed to fork