Refactor kafka to pure Go (franz-go), fix DBC stubs, update Dockerfile

pkg/dbc/n60/stub.go

@@ -0,0 +1,19 @@
+// Package n60 is a stub for generated DBC code.
+// Run ./scripts/generate-dbc.sh to generate actual CAN signal definitions.
+// See pkg/dbc/README.md for details.
+package n60
+
+import (
+	"github.com/fiskerinc/cloud-services/pkg/can-go/pkg/descriptor"
+)
+
+// Hash is the DBC file hash - stub value
+const Hash = "stub_n60"
+
+// MessagesDescriptor is a stub for the generated CAN message descriptor
+type MessagesDescriptor struct{}
+
+// Database returns an empty CAN database - regenerate with cantool for actual definitions
+func (m *MessagesDescriptor) Database() *descriptor.Database {
+	return &descriptor.Database{}
+}