Connection validation on borrow

Connection validation on borrow: a task in LegoFlow-SWE (Harbor dataset). Currently the pool does not validate connections when they are borrowed by an application. This means a connection that has become stale—for example because of a network outage or a server-side timeout—may be returned to the…

The task

Currently the pool does not validate connections when they are borrowed by an application. This means a connection that has become stale—for example because of a network outage or a server-side timeout—may be returned to the caller, causing immediate failures or silent errors.

Part of Lego-X/LegoFlow-SWE.