v0.12.0

Changelog

• 3e7bd92: ci: bump actions/deploy-pages in the github-actions group (#245) (@dependabot[bot])
• b388301: ci: bump node from 367679c to cd9f682 in /action (#244) (@dependabot[bot])
• 117c745: ci: require deterministic e2e suite on pull requests (#241) (@zpzjzj)
• 0186b47: feat(custom): support stateful multi-turn sessions (#250) (@zpzjzj)
• 3f2f82a: feat(examples): add DeepSeek Harness integration (#251) (@zpzjzj)
• 12ad944: fix(judge): harden first-attempt agent_judge prompt against prose prefixes (#260) (@JHWang-1997)
• 724d4fb: refactor(agent): retire legacy no-op config fields (#243) (@zpzjzj)