Prepare Ocelle SDK 1.0.0rc2

[manas-fortifyroot]

This PR prepares the second Ocelle SDK 1.0.0 release candidate.

Changes:

• Bumps package version from 1.0.0rc1 to 1.0.0rc2.
• Adds missing runtime dependency httpx, which is required by vendored runtime modules imported by fortifyroot.ocelle.
• Refreshes poetry.lock.
• Enhances publish-release.yml with post-publish verification:
  • clean TestPyPI install verification for RC publishes
  • clean PyPI install verification for final publishes
  • import and version assertion after install

Why:

• 1.0.0rc1 published to TestPyPI but failed clean import with ModuleNotFoundError: No module named 'httpx'.
• The publish workflow should catch this automatically after future TestPyPI/PyPI uploads.

Validation:

• Built local 1.0.0rc2 wheel.
• Installed local wheel into a clean virtual environment.
• Verified import fortifyroot.ocelle succeeds.
• Verified installed package metadata and fortifyroot.ocelle.__version__ match 1.0.0rc2.
• poetry run pytest passed: 501 passed.
• actionlint .github/workflows/publish-release.yml passed.
• git diff --check passed.