Support NATS-style wildcard patterns ("*" and ">") for subscribing
to events across multiple namespaces. This enables cross-cutting
concerns like logging, monitoring, and auditing without requiring
separate subscriptions for each namespace.
- Add pattern.go with MatchNamespacePattern and IsWildcardPattern
- Update EventBus to track wildcard subscribers separately
- Update NATSEventBus to use NATS native wildcard support
- Add comprehensive tests for pattern matching and EventBus wildcards
- Document security implications in all relevant code comments
Closes#20
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
