docs: Add comprehensive documentation for architectural enhancements
Created detailed documentation for all 5 architectural improvements:
Educational Documentation (_go-learning/):
- Created 005-architectural-enhancements.md (900+ lines)
- Detailed explanation of each enhancement
- Code examples and usage patterns
- Before/after comparisons
- Benefits and interview talking points
- Future considerations
Public Documentation (doc/):
- Updated 14-BACKEND-HANDLERS.md
- Added "Architectural Enhancements" section
- Response Types with examples
- Validation Tags guide
- Context Helpers usage
- Typed Errors documentation
- Performance Benchmarks guide
- Updated table of contents
- Updated changelog
Documentation Coverage:
- Response Types: Structure, helpers, usage examples
- Validation Tags: Declarative rules, self-documenting
- Context Helpers: 13 functions documented
- Typed Errors: 13 error codes, constructors, usage
- Benchmarks: 23 benchmarks, running instructions
All improvements now fully documented for:
- Internal learning and interviews
- Public consumption and contribution
- Developer onboarding
- Architecture understanding
juanatsap
c23068508f