refactor: migrate to clean architecture with trait-based DI (v0.2.0)

Complete architectural overhaul across all 12 crates:

- Replace validator crate with zod-rs for all DTO validation
- Replace manual pagination with paginator-rs/paginator-sea-orm
- Migrate all modules (iam, cms, gacha, dimentorin) to clean architecture:
  domain → application → infrastructure layers
- Introduce trait-based DI (Arc<dyn Trait>) at every layer for repositories and services
- Delete all v1/ legacy SurrealDB-era code across every crate
- Replace opaque response helpers with typed IntoResponse structs (ApiSuccess, ApiCreated, ApiPaginated, ApiMessage)
- Remove dual_mode_repository, migration_validation_errors, validator.rs dead code
- Zero cargo clippy warnings; release build clean

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

imphnen-iam/src/users/domain/service.rs

@@ -0,0 +1,19 @@
+use async_trait::async_trait;
+use paginator_rs::PaginationParams;
+use paginator_utils::PaginatorResponse;
+use imphnen_utils::AppError;
+use super::user::UserEntity;
+use super::repository::UserListItem;
+
+#[async_trait]
+pub trait UserService: Send + Sync {
+    async fn list(&self, params: PaginationParams) -> Result<PaginatorResponse<UserListItem>, AppError>;
+    async fn get(&self, id: String) -> Result<UserEntity, AppError>;
+    async fn get_me(&self, user_id: String) -> Result<UserEntity, AppError>;
+    async fn get_by_email(&self, email: String) -> Result<UserEntity, AppError>;
+    async fn create(&self, entity: UserEntity) -> Result<UserEntity, AppError>;
+    async fn update(&self, entity: UserEntity) -> Result<String, AppError>;
+    async fn delete(&self, id: String) -> Result<String, AppError>;
+    async fn set_active_status(&self, id: String, is_active: bool) -> Result<String, AppError>;
+    async fn update_password(&self, email: String, old_password: String, new_password: String) -> Result<String, AppError>;
+}