163 release allows complete module

// The other half of the gate: a complete, non-prototype module builds fine
// under `--release`. The release gate rejects ONLY `~[prototype]` modules — it
// must never touch ordinary code. Every terminal branch is handled here and
// there is no `~[prototype]` annotation, so `--release` compiles and runs it.

~import std/io

~pub event run {}
| done []const u8
| err []const u8

~proc run|zig {
    return .{ .done = "release build, all branches handled" };
}

~run()
| done msg |> std/io:print.ln(msg)
| err msg |> std/io:print.ln(msg)