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/modes/vm_fallback.rs

@@ -15,6 +15,9 @@ impl NyashRunner {
     /// - Respects using preprocessing done earlier in the pipeline
     /// - Relies on global plugin host initialized by runner
     pub(crate) fn execute_vm_fallback_interpreter(&self, filename: &str) {
+        // Note: hv1 direct route is now handled at main.rs entry point (before plugin initialization).
+        // This function is only called after plugin initialization has already occurred.
+
         // Read source
         let code = match fs::read_to_string(filename) {
             Ok(s) => s,