Description

Add missing trailing commas to match black formatting standards.

Changes Made

• Added missing trailing commas in Conv_AE and Conv_AE_GDN classes (lines 358 and 616)
• Ensures consistent code style with black formatter

Why This Matters

• Follows Python best practices for multi-line collections
• Prevents git diff issues when adding new items to lists
• Matches project's black formatting standards (mentioned in CONTRIBUTING.md)

Testing

• black --check baler/modules/models.py now passes
• No functional changes to the neural network code
• Existing tests should continue to pass