.forge/iss-155aa95ea6df-attempt-2.md

@@ -1,3 +0,0 @@
-# iss-155aa95ea6df-attempt-2
-
-Forge 이슈 작업 브랜치 `forge/iss-155aa95ea6df-attempt-2`.

docs/architecture/transaction-sequence.md

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-```mermaid
-sequenceDiagram
-    participant User as User
-    participant Checkout as Checkout Service
-    participant Payment as Payment Gateway
-    participant DB as Database
-
-    %% Normal flow
-    User->>Checkout: Initiate Checkout
-    Checkout->>DB: Save Order
-    DB-->>Checkout: Order Confirmation
-    Checkout->>Payment: Process Payment
-    Payment-->>Checkout: Payment Success
-    Checkout->>User: Payment Successful
-
-    %% External failure
-    User->>Checkout: Initiate Checkout
-    Checkout->>DB: Save Order
-    DB-->>Checkout: Order Confirmation
-    Checkout->>Payment: Process Payment
-    Payment-->>Checkout: Payment Failure
-    Checkout->>DB: Rollback Order
-    DB-->>Checkout: Order Rollback
-    Checkout->>User: Payment Failed
-
-    %% DB failure
-    User->>Checkout: Initiate Checkout
-    Checkout->>DB: Save Order
-    DB-->>Checkout: Order Confirmation
-    Checkout->>Payment: Process Payment
-    Payment-->>Checkout: Payment Success
-    Checkout->>DB: Commit Order
-    DB-->>Checkout: Error
-    Checkout->>DB: Rollback Order
-    DB-->>Checkout: Order Rollback
-    Checkout->>User: Payment Successful, Order Error
-```