pub fn default_embed_addr() -> PathBufExpand description
Default embed inference endpoint path, mirroring the daemon’s
endpoint::default_embed_addr. Returned as a PathBuf on Unix
and as a pipe-path string on Windows; callers pick by cfg.
Linux fallback chain (same as v2 / admin):
${XDG_RUNTIME_DIR}/inferd/infer.embed.sock${HOME}/.inferd/run/infer.embed.sock/tmp/inferd/infer.embed.sock