hv1: early-exit at main (no plugin init); tokenizer: Stage-3 single-quote + full escapes (\/ \b \f \' \r fix); builder: route BinOp via SSOT emit_binop_to_dst; hv1 verify canary route (builder→Core); docs: phase-20.39 updates

src/runner/dispatch.rs

@@ -9,6 +9,9 @@ use std::{fs, process};
 
 /// Thin file dispatcher: select backend and delegate to mode executors
 pub(crate) fn execute_file_with_backend(runner: &NyashRunner, filename: &str) {
+    // Note: hv1 direct route is now handled at main.rs entry point (before NyashRunner creation).
+    // This function is only called after plugins and runner initialization have already occurred.
+
     // Selfhost pipeline (Ny -> JSON v0)
     // Default: ON. Backward‑compat envs:
     //  - NYASH_USE_NY_COMPILER={1|true|on} to force ON