chore(D8): derive Debug on MetaQNetwork/SimpleLcg — fixes missing_debug_implementations lint

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

crates/ml/src/cuda_pipeline/meta_q_network.rs

@@ -37,6 +37,7 @@ impl MetaQInput {
 }
 
 /// Small MLP on host (CPU). n_params ≈ 7×32 + 32×16 + 16×1 + biases = ~800.
+#[derive(Debug)]
 pub struct MetaQNetwork {
     w1: Vec<f32>, b1: Vec<f32>,
     w2: Vec<f32>, b2: Vec<f32>,
@@ -187,6 +188,7 @@ impl Default for MetaQNetwork {
 }
 
 /// Deterministic LCG for reproducible weight init and minibatch sampling.
+#[derive(Debug)]
 struct SimpleLcg { state: u64 }
 
 impl SimpleLcg {