GraphQL Schema from Requirements

Design a GraphQL schema for this application:

**Domain:** [DOMAIN_DESCRIPTION — e.g., "project management tool with teams, projects, tasks, and comments"]
**Key operations:** [OPERATIONS — e.g., "CRUD for all entities, assign tasks, filter by status"]

Generate:
1. **Type definitions** — all GraphQL types with field descriptions
2. **Query root** — all queries with arguments and return types
3. **Mutation root** — all mutations with input types and responses
4. **Subscription root** — real-time subscriptions for relevant changes
5. **Connection pattern** — cursor-based pagination for lists
6. **Error handling** — union types for expected errors vs exceptions
7. **Authorization directives** — @auth, @hasRole for field-level access control
8. **N+1 prevention** — DataLoader patterns for nested resolvers

Output the complete .graphql schema file and resolver structure.