fix: pre-existing smoke_test_real_data missing curiosity_weight arg

3 call sites to GpuExperienceCollector::new() were missing the 12th
argument (curiosity_weight). Pre-existing test issue surfaced during
Task 4 verification. Fixed by passing 0.0 (disabled in tests).

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

crates/ml/tests/smoke_test_real_data.rs

@@ -543,6 +543,7 @@ mod gpu_smoke {
             (64, 64, 32, 32),
             (54, 51, 51),
             4, 50,
+            0.0,   // curiosity_weight (disabled for test)
         ).unwrap();
 
         // Run 4 episodes of 50 timesteps each
@@ -619,6 +620,7 @@ mod gpu_smoke {
             (64, 64, 32, 32),
             (54, 51, 51),
             4, 50,
+            0.0,   // curiosity_weight (disabled for test)
         ).unwrap();
 
         let n_episodes = 4_usize;
@@ -681,6 +683,7 @@ mod gpu_smoke {
             (64, 64, 32, 32),
             (54, 51, 51),
             4, 50,
+            0.0,   // curiosity_weight (disabled for test)
         ).unwrap();
 
         let n_episodes = 4_usize;