v0.5.2

Fixed

• route no longer swallows downstream failure detail on any path. Previously only
  protocol-level faults were relayed with attribution; a downstream tool that returned an
  error result kept its raw text — which, for servers built on the MCP C# SDK, is the
  genericized "An error occurred invoking '<tool>'." with the real exception logged only to
  the server process's stderr, invisible to the calling model. Now every failure path — error
  results, protocol faults, timeouts, connect failures — returns
  Downstream capability '<name>' tool '<tool>' failed: <verbatim downstream message> plus a
  stderr field carrying the lines the downstream process wrote during the failing call (e.g.
  System.ArgumentException: The arguments dictionary is missing a value for the required parameter 'repoPath'), so the model can self-correct without access to host logs.