refactor: organize backend by business responsibility

.ai/CONVENTIONS.md

@@ -6,12 +6,12 @@
 
 | Решение / сигнал | Читать |
 | --- | --- |
-| Новый module/provider/service; бизнес-логика; перенос responsibility | [Architecture](conventions/backend-architecture.md) |
+| Новый файл/suffix/layer; поиск feature owner; progressive structure; перенос responsibility | [Architecture](conventions/backend-architecture.md) |
 | Controller, DTO, route/status, validation/exception, публичная HTTP-семантика | [HTTP API](conventions/backend-http-api.md) |
-| Prisma/schema/query/persistence, transaction, migration, atomic write | [Data](conventions/backend-data.md) |
+| Repository/data access; Prisma/schema/query, transaction, migration, atomic write | [Data](conventions/backend-data.md) |
 | Тесты или behavior с testing risk | [Testing](conventions/backend-testing.md) |
 | JWT, cookie, login/refresh/logout, guard/access, token encryption, sensitive logs | [Security](conventions/security-auth.md) |
-| T-Bank/gRPC/proto, upstream retry/rate limit/cache, MoexClient | [Integrations](conventions/backend-integrations.md) |
+| External client/integration boundary; T-Bank/gRPC/proto, retry/rate limit/cache | [Integrations](conventions/backend-integrations.md) |
 | Logging/request context без изменения secrets/auth | [Logging](conventions/backend-architecture.md#logging) |
 | Новый abstraction/dependency, refactor, неясный scope | [Общий выбор реализации](../../docs/development/engineering-governance.md#выбор-реализации) |
 | Изменение request/response/route/status/error shape или Swagger metadata | HTTP API + [общий contract workflow](../../docs/development/runtime-openapi-verification.md) |