239 comment inside flow chain

// PINS: a comment line inside a flow chain is trivia — it does not split
// the chain. The KORU010 refusal is a parse limitation, not semantics:
// nothing about the comment changes which steps are chained.
const std = @import("std");
~tor a {} -> i32
~proc a|zig {
    return 1;
}
~tor b { x: i32 }
~proc b|zig {
    std.debug.print("b {d}\n", .{x});
}
~a(): n
// the chain survives narration
|> b(x: n)