feat(tsconnect/wasm): add hasShares filter to listDrivePeers
PeerCapabilityTaildriveSharer says a peer may share with us, not that it
does, so listDrivePeers is a superset of the peers actually exposing
shares. listDrivePeers now takes an options object; with
{hasShares: true} each candidate's taildrive root is probed with a
Depth-1 PROPFIND and only peers listing at least one share are kept.
The probe and its multistatus parsing live in cmd/tsconnect/driveprobe
so they can be tested without syscall/js. Probes run in parallel with a
bounded worker count, a per-probe timeout and a bounded response read;
a probe that fails drops that peer and is logged rather than failing
the call, so the filter is positive-only.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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