docs: update module references in README and guides

- Update README.md module structure (14→Profiling, 15→Memoization)
- Fix tier descriptions (10-13 Architecture, 14-19 Optimization)
- Update Module 13 next steps to reference Module 15
- Fix Module 15 prerequisite reference to Module 14
- Correct cifar10-training-guide module numbers

docs/cifar10-training-guide.md

@@ -6,9 +6,9 @@ This guide walks you through training a CNN on CIFAR-10 using your TinyTorch imp
 ## Prerequisites
 Complete these modules first:
 - ✅ Module 08: DataLoader (for CIFAR-10 loading)
-- ✅ Module 11: Training (for model checkpointing)
-- ✅ Module 06: Spatial (for CNN layers)
-- ✅ Module 10: Optimizers (for Adam optimizer)
+- ✅ Module 07: Training (for model checkpointing)
+- ✅ Module 09: Convolutional Networks (for CNN layers)
+- ✅ Module 06: Optimizers (for Adam optimizer)
 
 ## Step 1: Load CIFAR-10 Data