fix: use CopyOnWriteArrayList for thread-safe conversation history in InMemoryPersistenceFacade#3

rdobrik merged 4 commits intocodex/add-a2a-supportdscope-io/dscope-camel-agent:codex/add-a2a-supportfrom

copilot/sub-pr-1-againdscope-io/dscope-camel-agent:copilot/sub-pr-1-againCopy head branch name to clipboard