docs: checkpoint wallet read use cases

REFACTORING-AUDIT.md

@@ -380,3 +380,9 @@ Migration order implied by the map: isolate shared infrastructure constructors (
 - RabbitMQ/Watermill was already under `infrastructure/eventbus`; external service clients now live under `infrastructure/service` (Darano, Kavenegar, Mellat, and Vandar), and Stellar/Horizon operations now live under `infrastructure/stellar`.
 - Wallet, market, stream, and bootstrap call sites no longer import legacy implementation paths under `repository/db`, `repository/service`, or `port/stellar`. Temporary/non-Go artifacts left under the old service directory are not runtime implementations.
 - Full Wallet tests, race tests, vet, and build pass after the migration (`d121fc9`); W003 is complete.
+
+### `W004` — read-only wallet application boundary checkpoint
+
+- Added `application/walletread`, with transport-independent catalog, commission, network, and balance reader ports and use-case methods.
+- gRPC methods for asset list/get, asset commissions, network list, balance, and check-balance now delegate through the application boundary; protobuf conversion and existing error mapping remain in `core/walletImp`.
+- Focused and full Wallet tests pass in `b503518`. User wallet-list (which still includes Stellar synchronization) and transaction-list reads remain for the next W004 increment.

REFACTORING-TODO.md

@@ -120,7 +120,7 @@ This is the authoritative execution tracker for the refactor. Work is performed
 | W001 | `DONE` | Map wallet, market, alert, internal-wallet, cron, stream, DB, Redis, queue, and Stellar dependencies. | Process/operation-family map, repository ownership, active queue topology, peer/provider dependencies, Stellar coupling, and migration order are recorded in `REFACTORING-AUDIT.md`. |
 | W002 | `DONE` | Introduce wallet domain entities, value objects, errors, and repository ports. | Added transport/persistence-independent wallet entities, filters, value objects, domain errors, repositories, cache/UoW, blockchain, identity, notification, PSP, and event ports; focused/full tests and focused vet pass. |
 | W003 | `DONE` | Move PostgreSQL, Redis, RabbitMQ, external client, and Stellar adapters into infrastructure. | PostgreSQL/Redis, RabbitMQ Watermill, external service, and Stellar/Horizon implementations are infrastructure-owned; legacy implementation imports are removed; full tests, race tests, vet, and build pass. |
-| W004 | `TODO` | Extract read-only wallet use cases and gRPC adapters. | Responses and error mapping remain compatible. |
+| W004 | `STARTED` | Extract read-only wallet use cases and gRPC adapters. | Asset, commission, network, balance, and check-balance reads now use `application/walletread`; remaining wallet-list and transaction-list reads are still in the legacy service and must preserve response/error compatibility. |
 | W005 | `TODO` | Extract wallet initialization and asset/trustline use cases. | Transactions, key generation, trustlines, and rollback behavior are tested. |
 | W006 | `TODO` | Extract deposit, withdrawal, and transaction use cases. | Idempotency, balances, queues, and failure behavior are tested. |
 | W007 | `TODO` | Extract market use cases and adapters. | Pricing and market operations remain compatible. |
@@ -318,3 +318,4 @@ Append one row whenever a task changes status. Existing rows are never rewritten
 | 2026-08-30 | W002 | `TODO` | `DONE` | Added pure wallet entities/value objects, domain errors, filters, repository/cache/UoW ports, and blockchain/internal/external adapter boundaries; focused and full tests plus focused vet pass in `ac649d2`. |
 | 2026-08-30 | W003 | `TODO` | `STARTED` | Relocated all wallet PostgreSQL and Redis adapter implementations (including tests) from `repository/db` into `infrastructure/postgres` and `infrastructure/redis`; updated bootstrap imports and full Wallet tests pass in `d2580cd`. RabbitMQ, external service, and Stellar adapters remain. |
 | 2026-08-30 | W003 | `STARTED` | `DONE` | Relocated external service clients to `infrastructure/service` and Stellar/Horizon adapters to `infrastructure/stellar`; updated wallet, market, stream, and bootstrap imports; no legacy implementation imports remain; full tests, race tests, vet, and build pass in `d121fc9`. |
+| 2026-08-30 | W004 | `TODO` | `STARTED` | Added the `application/walletread` boundary and routed asset, commission, network, balance, and check-balance gRPC methods through it; focused and full Wallet tests pass in `b503518`. Wallet-list and transaction-list extraction remain. |