feat(navigation): add prominent validation quickstart action

validation-suite/backend/mercury/app/cli.py

@@ -8,6 +8,7 @@ from pathlib import Path
 
 from app.db.session import SessionLocal
 from app.models.user import User
+from app.services.demo_data import DemoDataService
 from app.services.reference_masterdata import ReferenceMasterdataImportService
 
 
@@ -83,6 +84,20 @@ def cmd_create_admin(_: argparse.Namespace) -> int:
         return 0
 
 
+def cmd_demo_data(args: argparse.Namespace) -> int:
+    with SessionLocal() as session:
+        summary = DemoDataService(session).run(
+            customers=args.customers,
+            devices=args.devices,
+            validations=args.validations,
+            reports=args.reports,
+            images=args.images,
+            reset=args.reset,
+        )
+        print(json.dumps(summary, ensure_ascii=False))
+        return 0
+
+
 def build_parser() -> argparse.ArgumentParser:
     parser = argparse.ArgumentParser(prog="python -m app.cli")
     subparsers = parser.add_subparsers(dest="command", required=True)
@@ -101,6 +116,15 @@ def build_parser() -> argparse.ArgumentParser:
 
     admin_parser = subparsers.add_parser("create-admin")
     admin_parser.set_defaults(func=cmd_create_admin)
+
+    demo_parser = subparsers.add_parser("demo-data")
+    demo_parser.add_argument("--customers", type=int, default=10)
+    demo_parser.add_argument("--devices", type=int, default=10)
+    demo_parser.add_argument("--validations", type=int, default=20)
+    demo_parser.add_argument("--reports", action="store_true")
+    demo_parser.add_argument("--images", action="store_true")
+    demo_parser.add_argument("--reset", action="store_true")
+    demo_parser.set_defaults(func=cmd_demo_data)
     return parser