phase: 20.49 COMPLETE; 20.50 Flow+String minimal reps; 20.51 selfhost v0/v1 minimal (Option A/B); hv1-inline binop/unop/copy; docs + run_all + CURRENT_TASK -> 21.0

apps/tests/method_postfix_finally_only.hako

@@ -0,0 +1,12 @@
+static box Main {
+  main(args) {
+    // try body: compute a value
+    local x = 41
+    // no return here; finally will return
+  }
+  cleanup {
+    // finally runs and returns x+1
+    x = x + 1
+    return x
+  }
+}