OpenViking now ships from Volcengine's own repo through the plugin catalog
(plugin-catalog/openviking.yaml, pinned in #131267). Delete the in-tree copy
and its tests; memory_provider_migration already lists openviking in
_LEFT_CORE, so homes configured for it get the catalog plugin installed on
hermes update / first agent start.
The catalog pin starts openviking-server with the full Hermes environment
(the bundled copy filtered it). The docs now say so and point at
volcengine/OpenViking#5553; start openviking-server yourself to avoid it.
05eecbcd97