维护者确认：#3011 远程 Claude 计费路由与 turn lease

PR https://github.com/makecindy/cindy/pull/3011 为保留远程 Claude 计费路由，新增 session route registry、turn lease 和 billing snapshot 路径，并改到 packages/maker-core 的 session 契约。

核心路径超过架构门阈值，且涉及跨模块数据契约，不是机械搬迁。旧讨论 issue 已关闭，当前 head 再次命中架构确认门，需要维护者重新确认。

确认方式：直接在 PR 上 Approve；需要修改就 Request Changes，作者改完后重新 Approve 即放行。

---
关联 PR:#3011(作者 @tiammomo);本 issue 由 review-pr 流程自动创建,用于先讨论该 PR 涉及的技术架构调整,维护者确认后 PR 会恢复推进。

Start by reviewing PR #3011 and the related changes in packages/maker-core, especially the session contract, session route registry, turn lease, and billing snapshot paths. This issue is for architectural confirmation rather than implementation; it is done when a maintainer approves the PR or requests changes, followed by re-approval after revisions.

Written by the indexing model from the issue text.