- Add AgentApiKey and AgentApiKeyCreateResult types and export them from @fusion/core
- Implement AgentStore API key create/list/revoke methods with SHA-256 token hashing and JSONL persistence
- Add comprehensive AgentStore coverage for CRUD behavior, revocation semantics, persistence, and concurrent key creation
- Add dashboard routes and API tests for POST/GET/DELETE agent key endpoints with 404/validation handling
- Add a minor @gsxdsm/fusion changeset for the new agent API key feature
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