v0.2.2 - Proof Agent v1.1.2

Summary

• Pin Proof Agent Verification to AndreaGriffiths11/proof-agent@v1.1.2.
• Consume the Proof Agent SDK session auth fix verified through the smoke-test PR.
• Bump Python package metadata and README release references to 0.2.2.

Validation

• Proof Agent verification passed on PR #26.
• ShellCheck passed on PR #26.
• python -m pytest - 19 passed locally.q
• version import check returns 0.2.2.
• workflow YAML parse check.