pub fn discover_xdg_log_paths() -> Option<PathBuf>Expand description
Discovers the XDG path for storing log files.
Checks CONTEXT7_HOME first: if set and valid, returns
{CONTEXT7_HOME}/context7/logs. Falls back to state_dir() on Linux
(XDG_STATE_HOME) with fallback to data_local_dir().
Returns None if neither source provides a path.