Migrate Backend to Strict TypeScript

[gitar-bot-staging]

Comprehensive TypeScript Migration and Type Safety Enhancement

Description

This PR implements a systematic migration to strict TypeScript with comprehensive type safety enhancements across the entire codebase. The changes introduce progressive TypeScript compiler strictness, comprehensive type coverage monitoring, and advanced type-safe patterns for APIs, events, and data handling.

Motivation

• Type Safety: Eliminate runtime type errors by implementing strict TypeScript configurations and replacing any types with proper interfaces
• Developer Experience: Provide better IDE support, autocompletion, and compile-time error detection
• Code Quality: Establish maintainable patterns for type-safe API routes, event handling, and data operations
• Monitoring: Enable continuous tracking of type coverage to prevent regression and support ongoing migration efforts

Key Changes

Core TypeScript Migration

• Progressive Strictness: Enabled noImplicitAny, strictNullChecks, noImplicitReturns, and strictPropertyInitialization
• Type Replacement: Systematically replaced any types with proper interfaces and branded types
• Enhanced Configuration: Added TypeScript project references and strict ESLint rules

Type Safety Infrastructure

• Type Coverage Monitoring: Comprehensive tooling for tracking and reporting type coverage metrics
• Migration Progress Tracking: Automated tools to monitor TypeScript migration progress
• Runtime Validation: Added API validation with proper type checking

Advanced Type Patterns

• Event System: Complete type-safe event system with mapped types and proper inference
• Generic CRUD Patterns: Reusable interfaces for database operations with full type safety
• API Route Handlers: Type-safe request/response patterns for API endpoints
• RPC Interfaces: Strict interface definitions for remote procedure calls
• Branded Types: Implementation of branded types for IDs and domain-specific values

Development Tooling

• Comprehensive Monitoring: Real-time type coverage analysis and reporting
• Documentation: Detailed README files for type coverage monitoring and event system usage
• Testing Infrastructure: Enhanced testing setup with proper TypeScript support

📊 Migration Statistics

• 18 commits implementing progressive TypeScript strictness
• New tooling files: Type coverage monitoring, migration tracking, event system
• Enhanced configurations: TSConfig, ESLint, and package management
• Documentation: Comprehensive guides for type coverage and event system usage

Impact

Benefits

• Improved Reliability: Compile-time type checking prevents runtime errors
• Better Developer Experience: Enhanced IDE support and autocompletion
• Maintainable Codebase: Clear interfaces and type boundaries
• Continuous Monitoring: Ongoing visibility into type coverage metrics

Considerations

• Large Changeset: Extensive modifications across the codebase requiring thorough review
• Dependency Updates: Significant additions to node_modules for TypeScript type definitions
• Build Process: Updated compilation and linting processes

---

🎸 Generated with Jimy

[nclskh]

Testing PR comment @ "Migrate Backend to Strict TypeScript" #136

[nclskh]

Testing PR comment @ "Migrate Backend to Strict TypeScript" #136