passes: junk classes with real bodies and no fingerprint

NoisePass now builds branching helper methods (counted int loop,
random arithmetic, even/odd merge, non-throwing ops only) whose
results the entry sums into a private static field, instead of an
empty run()V. Names come from the same NameGenerator styles as
real code and live in a random real package (no more shadow/decoy
uniformity for grep to catch); every generated method gets fresh
StackMapTable frames. weave_first_reachable takes (class, entry)
pairs. New NoiseConfig.junk_methods_per_class (default 3).

Tests assert invariants (unique valid identifiers, calls, field
store, determinism) plus real-JVM verification of junk classes;
paranoid+junk_ratio=1 smoke on lorep: 18 junk classes, all load.

crates/noxis-core/src/config/sections.rs

@@ -148,6 +148,9 @@ impl Default for ConstantsConfig {
 pub struct NoiseConfig {
     /// How many junk classes per real one (0 = disabled).
     pub junk_ratio: usize,
+    /// Branching helper methods per junk class (their results feed a
+    /// static field so the bodies read as live code, not dead weight).
+    pub junk_methods_per_class: usize,
     /// Number of junk annotations per class.
     pub junk_annotations: usize,
     /// Weave junk classes into the reachability graph (required for them to
@@ -159,6 +162,7 @@ impl Default for NoiseConfig {
     fn default() -> Self {
         Self {
             junk_ratio: 0,
+            junk_methods_per_class: 3,
             junk_annotations: 0,
             weave_reachable: true,
         }

crates/noxis-core/src/rng.rs

@@ -72,7 +72,7 @@ impl Rng {
         }
     }
 
-    /// Перемешать срез на месте (Fisher–Yates).
+    /// Перемешать срез на месте (Fisher-Yates).
     pub fn shuffle<T>(&mut self, items: &mut [T]) {
         for i in (1..items.len()).rev() {
             let j = self.below((i + 1) as u64) as usize;