The Nix package copies only what scripts/trace-daemon.mjs lists. The list
named the v1 bridge bundle but not opencode/v2/bridge-plugin.bundle.mjs,
so creating an OpenCode v2 agent from the Nix package failed with
"Bundled OpenCode bridge plugin artifact is missing".
List every bridge bundle under opencode/, and add a dist test that
installs the traced closure the way nix/package.nix does and loads the
bridge plugin for each OpenCode version from it.
Closes#5926
Co-authored-by: paseo-bot[bot] <266920839+paseo-bot[bot]@users.noreply.github.com>
