Module errors 

Error types, macros, and helpers for Axtra.

This module provides:

• The AppError enum for unified error handling
• Error construction macros ([app_error!])
• TypeScript type generation for error codes
• Notification integration (Slack, Discord, ntfy, cmdline.io, custom)
• Automatic error location tracking

See crate-level docs for usage examples.

Structs

ErrorResponse

SerializableValidationErrors

Represents all validation errors in a serializable form.

ValidationFieldError

Represents a single field validation error.

Enums

AppError

Unified error type for Axtra APIs.

ErrorCode

Enum of all possible error codes.

ErrorFormat

Supported error output formats.