feat: streamline plan/code-review/finalize router, add stream gate SDDs, sync dev-test inventory, update roadmap milestones
- Refactor plan, code-review, finalize-task-routing, refine-local-plans, router skills
- Add agent-workflow-loop-orchestration skill and plan agent configs
- Update roadmap: knowledge-tool-optimization milestones, stream-evidence-gate-core SDD
- Add stream-evidence-gate-core task, archive, and Go streamgate package
- Update dev-test inventory (edge/node smoke), agent-contract, edge-local-dev-guide
- Deprecate USER_REVIEW for output-validation-filters SDD