fix: normalize generated infrastructure file endings

cmd/go-omni/scaffold/apiInfrastructure.go

@@ -1,6 +1,9 @@
 package scaffold
 
-import "fmt"
+import (
+	"fmt"
+	"strings"
+)
 
 // APIInfrastructure renders shared infrastructure without inventing business
 // tables or routes. The API generator applies these as developer-owned seeds.
@@ -20,7 +23,7 @@ func APIInfrastructure(module, database, storage, logOutput, logFormat string) (
 		if err != nil {
 			return nil, fmt.Errorf("render %s: %w", name, err)
 		}
-		result[name] = []byte(content)
+		result[name] = []byte(strings.TrimRight(content, "\n") + "\n")
 	}
 	return result, nil
 }