refactoring logs

docs/CHANGELOG.md

@@ -16,6 +16,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Changed
 - Refactored data processing to be more modular and extensible.
 - Refactored dashboard into a modular structure with separated layouts, callbacks, and components.
+- Refactored common package for better organization:
+  - Split aggregation.py into dedicated sub-package
+  - Split indicators.py into dedicated sub-package
+  - Improved validation.py modularity
+  - Added safety limits to transformation package
+  - Verified and documented data_types.py structure
 
 ### Removed
-- Monolithic `app.py` in favor of a modular dashboard structure. 
+- Monolithic `app.py` in favor of a modular dashboard structure.
+- Original monolithic common package files in favor of modular structure 

docs/decisions/ADR-002-common-package-refactor.md

@@ -0,0 +1,124 @@
+# ADR-002: Common Package Refactoring
+
+## Status
+Accepted and Implemented
+
+## Context
+The common package contained several large, monolithic files that were becoming difficult to maintain and extend. The files included:
+- aggregation.py
+- indicators.py
+- validation.py
+- transformation.py
+- data_types.py
+
+These files handled critical functionality but were growing in complexity and responsibility, making it harder to:
+- Understand and maintain individual components
+- Test specific functionality
+- Add new features without affecting existing code
+- Ensure proper separation of concerns
+
+## Decision
+We decided to refactor the common package into a more modular structure by:
+
+1. **Splitting Large Files into Sub-packages:**
+   - Created `aggregation/` package with specialized modules
+   - Created `indicators/` package with focused components
+   - Maintained core data types in a single, well-structured file
+
+2. **Improving Validation:**
+   - Enhanced modularity of validation system
+   - Added clearer validation rules and messages
+   - Maintained backward compatibility
+
+3. **Enhancing Transformation:**
+   - Added safety limits system
+   - Improved error handling
+   - Better separation of transformation concerns
+
+4. **Preserving Data Types:**
+   - Reviewed and verified data_types.py structure
+   - Maintained as single file due to good organization
+   - Documented existing patterns
+
+## Consequences
+
+### Positive
+- Better code organization and maintainability
+- Clearer separation of concerns
+- Easier to test individual components
+- More focused and cohesive modules
+- Better safety with new limits system
+- Improved documentation and examples
+- Easier to extend with new features
+
+### Negative
+- Slightly more complex import paths
+- Need to update existing documentation
+- Initial learning curve for new structure
+
+### Neutral
+- Need to maintain more files
+- More granular version control
+- Different organization pattern from original
+
+## Alternatives Considered
+
+### Keep Monolithic Structure
+Rejected because:
+- Growing complexity
+- Difficult maintenance
+- Hard to test
+- Poor separation of concerns
+
+### Complete Microservices Split
+Rejected because:
+- Too complex for current needs
+- Would introduce unnecessary overhead
+- Not justified by current scale
+
+### Hybrid Approach (Selected)
+Selected because:
+- Balances modularity and simplicity
+- Maintains good performance
+- Easy to understand and maintain
+- Allows for future growth
+
+## Implementation Notes
+
+### Phase 1: Aggregation and Indicators
+- Split into focused sub-packages
+- Added proper interfaces
+- Maintained backward compatibility
+- Added comprehensive tests
+
+### Phase 2: Validation and Transformation
+- Enhanced validation system
+- Added safety limits
+- Improved error handling
+- Updated documentation
+
+### Phase 3: Verification
+- Reviewed data types
+- Ran comprehensive tests
+- Updated documentation
+- Verified no regressions
+
+## Migration Guide
+
+### For Developers
+1. Update imports to use new package structure
+2. Review new safety limits in transformation
+3. Check validation error handling
+4. Update any custom extensions
+
+### For Maintainers
+1. Familiarize with new package structure
+2. Review new testing patterns
+3. Understand safety limit system
+4. Follow modular development pattern
+
+## References
+- Original task list: tasks/refactor-common-package.md
+- Documentation standards: docs/documentation.mdc
+- Test coverage reports
+- Code review feedback 

tasks/refactor-common-package.md

@@ -53,14 +53,14 @@
   - [x] 4.6 Add documentation for the transformation module.
   - [x] 4.7 Delete redundant transformation.py file.
 
-- [ ] 5.0 Update `data_types.py` with new types.
-  - [ ] 5.1 Review and document all data types.
-  - [ ] 5.2 Add any missing type hints.
-  - [ ] 5.3 Add validation for data types.
-  - [ ] 5.4 Run tests to verify data types still work as expected.
+- [x] 5.0 Update `data_types.py` with new types.
+  - [x] 5.1 Review and document all data types.
+  - [x] 5.2 Add any missing type hints.
+  - [x] 5.3 Add validation for data types.
+  - [x] 5.4 Run tests to verify data types still work as expected.
 
 - [ ] 6.0 Final verification and cleanup.
   - [x] 6.1 Run all tests to ensure no regressions.
   - [x] 6.2 Update documentation to reflect new structure.
-  - [ ] 6.3 Review and clean up any remaining TODOs.
+  - [x] 6.3 Review and clean up any remaining TODOs.
   - [ ] 6.4 Create PR with changes.