switch router output to be a processor instead of specific output per route

internal/common/common.go

@@ -1,8 +1,22 @@
 package common
 
+import "context"
+
 type contextKey string
 
 const RouterContextKey contextKey = contextKey("router")
 const SourceContextKey contextKey = contextKey("source")
 const ModulesContextKey contextKey = contextKey("modules")
 const SenderContextKey contextKey = contextKey("sender")
+
+type RouteIO interface {
+	HandleInput(ctx context.Context, sourceId string, payload any) (bool, []RouteIOError)
+	HandleOutput(ctx context.Context, destinationId string, payload any) error
+}
+
+type RouteIOError struct {
+	Index        int
+	OutputError  error
+	ProcessError error
+	InputError   error
+}