feat: 扩展 Rust gateway 全功能模块，新增 billing/crypto/wallet crate 及完整数据层

- 新增 aether-billing、aether-crypto、aether-wallet 独立 crate
- aether-data 扩展 repository 层：announcements、auth_modules、billing、
  candidate_selection、gemini_file_mappings、global_models、management_tokens、
  oauth_providers、proxy_nodes、quota、users、wallet 等模块
- aether-gateway 新增 api/auth/billing/control/middleware/scheduler/usage/
  video_tasks/hooks/maintenance/model_fetch/provider_transport 等功能模块
- 重构 executor decision 和 gateway state 为模块目录结构
- 新增 gateway router、frontdoor 路由层及对应测试
- Python 侧 API 路由重构，新增 compat/support 模块
- 前端 Logo 组件更新及 Provider 管理页面调整

crates/aether-data/src/repository/management_tokens/mod.rs

@@ -0,0 +1,12 @@
+mod memory;
+mod sql;
+mod types;
+
+pub use memory::InMemoryManagementTokenRepository;
+pub use sql::SqlxManagementTokenRepository;
+pub use types::{
+    CreateManagementTokenRecord, ManagementTokenListQuery, ManagementTokenReadRepository,
+    ManagementTokenWriteRepository, RegenerateManagementTokenSecret, StoredManagementToken,
+    StoredManagementTokenListPage, StoredManagementTokenUserSummary, StoredManagementTokenWithUser,
+    UpdateManagementTokenRecord,
+};