✨ Enhance NATS configuration and error handling. Introduce stream limits and consumer rules in configuration files. Refactor message processing to handle permanent errors. Update README and development configuration to reflect changes. Add tests for new error handling mechanisms.

internal/app/processor.go

@@ -1,9 +1,9 @@
 package app
 
 import (
-	"context"
 	"caatsm/internal/adapter"
 	"caatsm/internal/adapter/parser"
+	"context"
 	"fmt"
 	"go.uber.org/zap"
 )
@@ -34,13 +34,13 @@ func NewMessageProcessor(
 // Handle processes a message
 func (p *MessageProcessor) Handle(ctx context.Context, raw []byte, msgID string) error {
 	if raw == nil || len(raw) == 0 {
-		return fmt.Errorf("empty message")
+		return Permanent(fmt.Errorf("empty message"))
 	}
 
 	// Parse the message
 	parsed := p.parser.Parse(string(raw))
 	if parsed == nil {
-		return fmt.Errorf("parser returned nil")
+		return Permanent(fmt.Errorf("parser returned nil"))
 	}
 
 	// Set the message ID from NATS