Fix Build Errors

Systematically resolve compilation/build errors.

Process

1. Run build - Capture full error output
2. Parse errors - Extract and categorize all errors
3. Prioritize - Fix root causes first (dependency → syntax → type)
4. Fix iteratively - One error at a time, rebuild after each
5. Verify - Confirm clean build

Build Commands

# Java/Maven
mvn compile 2>&1 | head -100