Bump AWF firewall version to v0.25.68

[lpcox]

Request

Bump the pinned AWF firewall container version to v0.25.68.

Key changes in this release

• fix(api-proxy): restore PAT-safe integration ID behavior and normalize dated CAPI model names — fixes 400 errors from deprecated anthropic-beta header values and ensures correct GITHUB_COPILOT_INTEGRATION_ID for PAT auth
• feat(smoke-claude): token optimization — disables GitHub MCP, max-turns 2, single-turn bash
• refactor(tests): extract useTempDir helper — eliminates 9 duplicate temp-dir setup blocks

Release

https://github.com/github/gh-aw-firewall/releases/tag/v0.25.68