feat: vertical slice — migrations, postgres adapters, presentation handlers, bootstrap wiring

crates/adapters/postgres/src/user_repository.rs

@@ -42,7 +42,10 @@ impl PostgresUserRepository {
 
 #[async_trait]
 impl UserRepository for PostgresUserRepository {
-    async fn find_by_id(&self, id: &SystemId) -> Result<Option<domain::entities::User>, DomainError> {
+    async fn find_by_id(
+        &self,
+        id: &SystemId,
+    ) -> Result<Option<domain::entities::User>, DomainError> {
         let row = sqlx::query_as::<_, UserRow>(
             "SELECT id, username, email, password_hash, created_at FROM users WHERE id = $1",
         )
@@ -54,7 +57,10 @@ impl UserRepository for PostgresUserRepository {
         row.map(TryInto::try_into).transpose()
     }
 
-    async fn find_by_email(&self, email: &Email) -> Result<Option<domain::entities::User>, DomainError> {
+    async fn find_by_email(
+        &self,
+        email: &Email,
+    ) -> Result<Option<domain::entities::User>, DomainError> {
         let row = sqlx::query_as::<_, UserRow>(
             "SELECT id, username, email, password_hash, created_at FROM users WHERE email = $1",
         )
@@ -66,7 +72,10 @@ impl UserRepository for PostgresUserRepository {
         row.map(TryInto::try_into).transpose()
     }
 
-    async fn find_by_username(&self, username: &str) -> Result<Option<domain::entities::User>, DomainError> {
+    async fn find_by_username(
+        &self,
+        username: &str,
+    ) -> Result<Option<domain::entities::User>, DomainError> {
         let row = sqlx::query_as::<_, UserRow>(
             "SELECT id, username, email, password_hash, created_at FROM users WHERE username = $1",
         )