* Reorganize Agent Host integration tests
Separate protocol, provider E2E, mocked-LLM, and direct SDK test families, and split shared provider scenarios into focused suites.\n\n(Written by Copilot)\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
* Address Agent Host test review feedback
Keep coverage scope metadata and replay fixture documentation aligned with the reorganized suites.\n\n(Written by Copilot)\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
* Limit Agent Host coverage to provider E2E tests
Exclude mock-agent and mocked-LLM suites so the report measures only the real server and bundled provider stacks with replayed model traffic.\n\n(Written by Copilot)\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
* Clarify Agent Host E2E test boundaries
Move synthetic-LLM suites into provider integration, flatten E2E captures, and simplify the checked-in coverage summary path without changing tests or fixture contents.\n\n(Written by Copilot)\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>