* fix: zeroentropy rerank URL missing /v1 prefix and MCP routing tests
- Fix ZeroEntropy reranker URL: /models/rerank -> /v1/models/rerank (#453)
- Fix test_mcp_routing tests: update assertions to use submit_async_retain
instead of the non-existent async_processing=False/retain_batch_async pattern
* fix(openclaw): pass retainEveryNTurns through getPluginConfig and set it to 1 in tests
getPluginConfig was not forwarding retainEveryNTurns from the raw config,
so pluginConfig.retainEveryNTurns was always undefined (defaulting to 10).
The integration tests use retainEveryNTurns: 1 so retain fires every turn.
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