GET-019: be get be://host?/<title> clone is broken — truncated pack + stale-server ?main

A full be:// clone produces an unusable worktree on two counts: the wire server ships a truncated pack, and it serves a stale ?main.

$ be get be://localhost?/beagle be: subdir clone — shard at /home/gritzko/.be/localhost unpk: scan incomplete 128215/253812 … BE.dbg: sub path=abc pin=e69de29bb2d1d6434b8b29ae775ad8c2e48c5391 … sniff: not a commit → SNIFFFAIL → SUBSPARSE → BEDOGEXIT

See Keeper, Store.

Issues

Impact

The Issues loop needs independent clones per worker (be get be://localhost?/beagle); if a clone is truncated/poisoned, the isolated-tree workflow is impossible — which is part of why today's work fell back to the shared store and corrupted it. Workflow-critical.

Planned