feat(tool-metadata): add shared metadata contract and bridge

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
(cherry picked from commit a1842f2de7ae25a1a01bf93a1ed82e21998dd340)