Feature ideas for v2.0

[openguardrail]

Collecting ideas for future versions. Some we're considering:

• Error catalog generator - auto-generate documentation from error enums (markdown table of all codes)
• Spring Boot starter - auto-configure exception handlers and actuator error metrics
• Error i18n - support localized error messages via resource bundles
• Error chaining - link related errors (e.g., root cause mapping)
• OpenAPI integration - generate error response schemas from error definitions

What would be most valuable for your use case? Vote with 👍 on the ones you want, or suggest new ideas.