feat: complete Phase 1 infrastructure

- erp-core: error types, shared types, event bus, ErpModule trait
- erp-server: config loading, database/Redis connections, migrations
- erp-server/migration: tenants table with SeaORM
- apps/web: Vite + React 18 + TypeScript + Ant Design 5 + TailwindCSS
- Web frontend: main layout with sidebar, header, routing
- Docker: PostgreSQL 16 + Redis 7 development environment
- All workspace crates compile successfully (cargo check passes)

crates/erp-server/src/main.rs

@@ -3,6 +3,8 @@ mod db;
 
 use axum::Router;
 use config::AppConfig;
+use erp_server_migration::Migrator;
+use erp_server_migration::MigratorTrait;
 use tracing_subscriber::EnvFilter;
 
 #[tokio::main]
@@ -24,6 +26,10 @@ async fn main() -> anyhow::Result<()> {
     // Connect to database
     let db = db::connect(&config.database).await?;
 
+    // Run migrations
+    Migrator::up(&db, None).await?;
+    tracing::info!("Database migrations applied");
+
     // Connect to Redis
     let _redis_client = redis::Client::open(&config.redis.url[..])?;
     tracing::info!("Redis client created");