Integrate Claude agent SDK into server provider adapter

- add `@anthropic-ai/claude-agent-sdk` dependency for `apps/server`
- replace placeholder Claude adapter with live session/query/event handling
- add comprehensive adapter tests for runtime events, approvals, resume, rollback, and model overrides
e5f12e6507Julius Marminge committed on 2/28/2026, 5:35:57 AMparentf00d414
5 files changedLine totals unavailable