91b7e9541b
The factory quoted System.Text.Json's message (and attached the JsonException) into the failure that reaches InitializeFailed -> health LastError -> /hosts; a pasted connection-string literal is exactly the malformed text that lands there. The message now names the instance and the line/byte position only, as the probe and browser already do. Refs #744 Claude-Session: https://claude.ai/code/session_01Ub9hGmYLQvn9XETzw7CMsT