fix: go 1.24 compat, CI discipline in all subagents, CodeRabbit rules
- go.mod: go 1.24 (compatible with golangci-lint latest)
- CI: GO_VERSION=1.24, golangci-lint latest, integration tests with PG+Redis
- All 6 dev subagents: added CI discipline rules (must pass before merge, fix CI before new features, worktree isolation)
- develop command: added CI enforcement rules
- CodeRabbit: added Knowledge Store scope check, Credential security check, OAuth token refresh review rules
Co-Authored-By: Claude Opus 4.6 (1M context) noreply@anthropic.com