## Why
When a local proxy request disconnects before network approval completes, the
owning tool call needs a model-visible explanation instead of remaining tied to
the abandoned request.
## What changed
- Track disconnect timing while plain HTTP and CONNECT requests await policy
decisions.
- Cancel the owning execution and report how long the request waited when it
disconnects before approval completes.
- Preserve an explicit approval outcome when disconnect cleanup runs afterward.
## Testing
Added unit coverage for disconnect tracking and outcome precedence, plus
end-to-end coverage for plain HTTP and CONNECT requests.
GitOrigin-RevId: b354b29bbe86f38e252fcaf529541f177480136b
ba37d0c45b