Normalized, bounded request metadata passed to host callbacks.
:protocol-:http,:websocketor:raw(SFTP/NBD upgrade).:method- the HTTP method.:path- the original percent-encoded path, exactly as received.:query- the original raw query string, exactly as received.:project,:target- native selections from the raw query, ornil.:all_projects- whetherall-projectswas requested.:operation- the operation ID for/1.0/operations/{id}...paths.:peer-%{address: ..., port: ..., certificate: der | nil}from the server adapter.:authorization- the caller'sauthorizationheader, ornil. It is never forwarded to the backend.