UPDATE_LOG_DIR: Path = default_cache_dir() 'deepagents-code' 'update_logs'Directory for persisted update command logs.
Lives under the OS cache directory (default_cache_dir()), since these are
ephemeral uv/pip diagnostics rather than app state. Note the install
script's <cache>/deepagents-code/install.log follows
${XDG_CACHE_HOME:-~/.cache} unconditionally, so on macOS the two logs land
under different roots.