SQLite 池的激活可以将同一连接借给两个活动的所有者

Run the following project in an empty directory with `dotnet run -- pool-result.json 30000`. It only clears its own pool between waves, with all previous owners closed, then starts 16 concurrent opens and keeps every owner alive. It stops and exits 1 when duplicate ownership is detected. Since this is a race, the failing wave varies and a run can pass.