fix(ml): fix test files using wrong foxhunt_ml:: crate name

Replaced foxhunt_ml:: with ml:: in 4 test files:
- dqn_full_gradient_flow_integration_test.rs
- dqn_gradient_flow_isolation_test.rs
- tft_int8_forward_integration_test.rs
- tft_int8_integration_test.rs

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

ml/tests/dqn_full_gradient_flow_integration_test.rs

@@ -3,11 +3,11 @@
 // Created: 2025-11-21 (Test-Driven Development Campaign)
 
 use candle_core::{DType, Device, Tensor};
-use foxhunt_ml::dqn::config::DQNConfig;
-use foxhunt_ml::dqn::dqn::DistributionalDuelingConfig;
-use foxhunt_ml::dqn::replay_buffer_type::ReplayBufferType;
-use foxhunt_ml::error::MLError;
-use foxhunt_ml::trainers::dqn::{DQNTrainer, DQNTrainerConfig};
+use ml::dqn::config::DQNConfig;
+use ml::dqn::dqn::DistributionalDuelingConfig;
+use ml::dqn::replay_buffer_type::ReplayBufferType;
+use ml::error::MLError;
+use ml::trainers::dqn::{DQNTrainer, DQNTrainerConfig};
 use std::sync::Arc;
 
 /// Helper function to create minimal DQN config for testing

ml/tests/dqn_gradient_flow_isolation_test.rs

@@ -4,8 +4,8 @@
 
 use candle_core::{DType, Device, Tensor, Var};
 use candle_nn::{linear, AdamW, Linear, Optimizer, VarBuilder, VarMap};
-use foxhunt_ml::dqn::dqn::{DistributionalDuelingConfig, DistributionalDuelingQNetwork};
-use foxhunt_ml::error::MLError;
+use ml::dqn::dqn::{DistributionalDuelingConfig, DistributionalDuelingQNetwork};
+use ml::error::MLError;
 
 /// Test 1: Network Forward Pass Gradient Flow
 /// Goal: Verify gradients flow through DistributionalDuelingQNetwork.forward()

ml/tests/tft_int8_forward_integration_test.rs

@@ -4,7 +4,7 @@
 
 use anyhow::Result;
 use candle_core::{DType, Device, Tensor};
-use foxhunt_ml::tft::{QuantizedTemporalFusionTransformer, TFTConfig};
+use ml::tft::{QuantizedTemporalFusionTransformer, TFTConfig};
 
 #[test]
 fn test_quantized_tft_forward_pass_integration() -> Result<()> {

ml/tests/tft_int8_integration_test.rs

@@ -6,9 +6,9 @@
 //! 3. Checkpoint saving with metadata
 //! 4. Verify memory savings
 
-use foxhunt_ml::checkpoint::FileSystemStorage;
-use foxhunt_ml::tft::training::{TFTBatch, TFTDataLoader};
-use foxhunt_ml::trainers::tft::{TFTTrainer, TFTTrainerConfig};
+use ml::checkpoint::FileSystemStorage;
+use ml::tft::training::{TFTBatch, TFTDataLoader};
+use ml::trainers::tft::{TFTTrainer, TFTTrainerConfig};
 use ndarray::Array2;
 use std::path::PathBuf;
 use std::sync::Arc;