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-gacha/src/gacha_credits/infrastructure/http/routes.rs

@@ -0,0 +1,21 @@
+use std::sync::Arc;
+use axum::{Router, routing::{get, post}, Extension};
+use sea_orm::DatabaseConnection;
+use crate::gacha_credits::application::GachaCreditServiceImpl;
+use crate::gacha_credits::domain::GachaCreditService;
+use crate::gacha_credits::infrastructure::persistence::PostgresGachaCreditRepository;
+use super::handlers::{get_user_credits, post_add_credits, post_consume_credit};
+
+fn build_service(db: DatabaseConnection) -> Arc<dyn GachaCreditService> {
+    let repo = Arc::new(PostgresGachaCreditRepository::new(db));
+    Arc::new(GachaCreditServiceImpl::new(repo))
+}
+
+pub fn gacha_credit_router(db: DatabaseConnection) -> Router {
+    let service = build_service(db);
+    Router::new()
+        .route("/", get(get_user_credits))
+        .route("/add", post(post_add_credits))
+        .route("/consume", post(post_consume_credit))
+        .layer(Extension(service))
+}