Reuse test-owned stdio MCP connections within two stateless source-analysis matrices while retaining every original CLI/MCP scenario, schema/Evidence checks and test-finished cleanup. Add cross-input identity controls.
Validation: 23 focused public-workflow tests and complete check:ci passed; stale-response fault detected. Exact-head hosted CI and available review passed. Pinned workload measurements and their limits are recorded in the PR.
Refs #4737.
Ysopwnable
9d5b931875