Project-level description from vector metadata (ProjectAnalysis).
Client calls Folder.rpc_project_description on the daemon ([`2.10.4.1`](../../docs/plans/FILES-2.10.4.1-ollmfilesd-rpc-api.md)).
Callers (Skill/Runner, Task/Details, Task/Tool) must yield this at cutover (was synchronous on shipping Folder).
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description text, or empty string |