The 10 s concurrent-load bound also hit slow but healthy first imports. A
second agent built while a provider's import took longer than 10 s got no
memory provider for its whole session, and with checkpoint_required every
compaction then failed closed.
The bound now applies only inside plugin_loader.bounded_load_wait(), which
the per-turn gateway memory identity signature uses. Other callers (agent
builds) wait for the in-flight load. Cycle detection still breaks a
cross-thread deadlock for every caller.
3a6d709921