v1.108.72 - resolve_repo flags relative paths over detached transports

resolve_repo now flags relative-path inputs. A relative path (e.g. ".") resolves against the jcodemunch server process's working directory; over a detached SSE/streamable-http transport that is not the caller's directory, so "." could silently bind to the wrong repo. Resolution behavior is unchanged (backward compatible); a relative input now carries a top-level relative_path_warning plus structured _meta.relative_path (raw input, the CWD-relative absolute resolution, and a fix hint). Absolute-path callers get byte-identical output. New tests/test_v1_108_72.py (4). Full suite 4700 passed / 10 skipped.