Initial commit: Full Crawl API implementation

crates/db/tests/db_test.rs

@@ -0,0 +1,18 @@
+use shared::models::User;
+
+#[test]
+fn test_user_model_serialization() {
+    let user = User {
+        id: uuid::Uuid::new_v4(),
+        email: "test@example.com".to_string(),
+        password_hash: Some("hash".to_string()),
+        google_id: None,
+        credits: 30,
+        tier: "free".to_string(),
+        created_at: chrono::Utc::now(),
+        updated_at: chrono::Utc::now(),
+    };
+
+    let json = serde_json::to_string(&user).unwrap();
+    assert!(json.contains("test@example.com"));
+}