100 aspire comptime pgo route order

// ASPIRATION — currently RED, a PIN not a regression (never been green).
//
// PGO-SHAPED LOWERING (the Orisha north star, named 2026-07-04): a template's
// |koru facet emits code whose SHAPE is computed from profile data at compile
// time — here, route dispatch ordered hottest-first. The router is ordinary
// runtime code; only its ORDER is decided during compilation. Because the
// lowering target is Koru (not host text), the reordered dispatch is
// analyzed, optimized, and emitted per-target like hand-written source, and
// `koruc --print` can show what the profile decided.
//
// ASPIRATIONAL bits: the [template]/|koru head (pinned at 310_099) and the
// `order_by_hits` Liquid filter (INVENTED — custom-filter precedent is
// parse_range, template_processor.zig; spelling open). The fragment tier —
// routes held as first-class AST values in comptime Koru, assembled in
// computed order — is the eventual mechanism; its surface is deliberately
// UNRULED and this pin does not invent it. When ruled, this pin upgrades.
~import std/io

~pub event routes { profile: []const u8 }

~[template] proc routes|koru {
    {% const ordered = order_by_hits(profile) %}
    std/io:print.ln("dispatch order: {{ ordered }}")
}

~routes(profile: "home:3,api:41,health:8")