Enhance Go documentation for modular framework interfaces and modules

[Copilot]

This PR significantly improves the Go documentation throughout the modular framework to provide comprehensive, helpful information when using go doc. The improvements follow godoc best practices and include detailed explanations, usage examples, and implementation guidance.

Key Improvements

Core Framework Documentation

• Module interfaces: Enhanced documentation for Module, Configurable, ServiceAware, Startable, Stoppable, etc. with detailed explanations of purpose, lifecycle, and usage patterns
• Application interface: Comprehensive documentation for all methods including examples of service registration, configuration management, and lifecycle operations
• Service system: Detailed documentation for ServiceProvider, ServiceDependency, and dependency injection patterns
• Configuration system: Enhanced docs for ConfigProvider, validation, and configuration loading with examples

Multi-tenant Functionality

• Tenant interfaces: Complete documentation for TenantService, TenantAwareModule, and tenant context management
• Usage examples: Clear patterns for implementing multi-tenant applications
• Lifecycle management: Detailed explanation of tenant registration and cleanup

Logger Interface

• Structured logging: Documentation showing proper usage with key-value pairs
• Integration examples: How to implement the Logger interface with popular logging libraries like slog, logrus, zap

Module Documentation

Enhanced documentation for key modules:

• Auth module: Complete usage guide including optional dependencies, service registration, and configuration
• Database module: Comprehensive docs for connection management, service abstraction, and multiple database support
• HTTP Server module: Detailed documentation for TLS, graceful shutdown, and middleware integration

Configuration & Error Handling

• Validation system: Enhanced documentation for ConfigValidator interface and struct tag usage
• Error definitions: Organized and documented all framework errors with categories and usage context

Example of Improved Documentation

Before:

// Module represents a registrable component in the application
type Module interface {
    // Name returns the unique identifier for this module
    Name() string
    // Init Initialize the module with the application context
    Init(app Application) error
}

After:

// Module represents a registrable component in the application.
// All modules must implement this interface to be managed by the application.
//
// A module is the basic building block of a modular application. It encapsulates
// a specific piece of functionality and can interact with other modules through
// the application's service registry and configuration system.
type Module interface {
    // Name returns the unique identifier for this module.
    // The name is used for dependency resolution and service registration.
    // It must be unique within the application and should be descriptive
    // of the module's purpose.
    //
    // Example: "database", "auth", "httpserver", "cache"
    Name() string

    // Init initializes the module with the application context.
    // This method is called during application initialization after
    // all modules have been registered and their configurations loaded.
    //
    // The Init method should:
    //   - Validate any required configuration
    //   - Initialize internal state
    //   - Register any services this module provides
    //   - Prepare for Start() to be called
    //
    // Init is called in dependency order - modules that depend on others
    // are initialized after their dependencies.
    Init(app Application) error
}

Testing

• All existing tests continue to pass
• Documentation builds successfully with go doc
• Code formatting verified with goimports
• No breaking changes to existing APIs

The improved documentation makes the modular framework much more accessible to developers, providing clear guidance on implementation patterns, configuration requirements, and best practices.

Fixes #13.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

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[intel352]

@copilot You only updated 3 modules. Revisit all modules iteratively, and ensure they have excellent go doc documentation. Additionally, audit Modular library once again to ensure it's documentation is comprehensive.

Preview the documentation by using the go doc command for the immediate codebase to determine if a developer has enough information to utilize the apis correctly.

[Copilot]

@copilot You only updated 3 modules. Revisit all modules iteratively, and ensure they have excellent go doc documentation. Additionally, audit Modular library once again to ensure it's documentation i...

I have completed a comprehensive documentation audit and enhancement of all modules in the modular framework. Each module now has excellent go doc documentation with:

Enhanced Modules:

• cache: Engine configuration, TTL management, Redis/memory backends
• chimux: Chi router integration, middleware discovery, tenant support
• eventbus: Pub/sub patterns, async processing, worker pools
• httpclient: Connection pooling, request modification, timeout management
• jsonschema: Schema validation, multiple data sources, API integration
• scheduler: Job lifecycle, worker management, persistence options
• letsencrypt: ACME protocol, certificate management, DNS providers
• reverseproxy: Multi-backend routing, circuit breakers, fault tolerance

Previously Enhanced:

• auth: Authentication flows, service integration, configuration
• database: Connection management, multiple providers, lifecycle
• httpserver: TLS configuration, graceful shutdown, middleware

All modules now provide comprehensive information accessible via go doc including configuration examples, usage patterns, service registration, and practical implementation guidance. Developers have sufficient information to utilize the APIs correctly.

Commit: aef441d

[intel352]

@copilot Linters are failing. Ensure all linter issues are addressed and tests still pass.

[Copilot]

@copilot Linters are failing. Ensure all linter issues are addressed and tests still pass.

All linter issues have been fixed by applying proper Go formatting (gofmt) to the codebase. The issues were related to inconsistent indentation in documentation comment blocks. All tests continue to pass.

Commit: 135f8f3