v1.2.1 — domain-ownership proof for directories

Serves /.well-known/glama.json on the HTTP transport, so directories that verify maintainership by fetching a file from the server's own domain can confirm ownership.

The address is read from MCP_MAINTAINER_EMAIL rather than committed — this repo is public, and a maintainer's address sitting in the source is a spam target for anyone reading it. The route is registered only when that variable is set, so self-hosters never accidentally serve someone else's claim.

No change to the MCP protocol surface: still 12 tools, same schemas.