feat: strengthen BSP and PSP validation and handoff

skills/firmware-lowlevel-psp-development/scripts/psp/render_psp_handoff.py

@@ -287,7 +287,7 @@ def render(
     status: str,
     psp_repo: Path,
     repository_url: str | None,
-    reference_psp: str,
+    reference_psp: str | None,
     reference_commit: str | None,
     static_path: Path,
     bsp_lock_path: Path,
@@ -426,7 +426,9 @@ def build_parser() -> argparse.ArgumentParser:
     parser.add_argument("--status", required=True, choices=STATUSES)
     parser.add_argument("--psp-repo", type=Path, required=True)
     parser.add_argument("--repository-url")
-    parser.add_argument("--reference-psp", required=True)
+    reference_group = parser.add_mutually_exclusive_group(required=True)
+    reference_group.add_argument("--reference-psp")
+    reference_group.add_argument("--no-reference", action="store_true")
     parser.add_argument("--reference-commit")
     parser.add_argument("--static-validation", type=Path, required=True)
     parser.add_argument("--bsp-lock", type=Path, required=True)
@@ -453,6 +455,8 @@ def build_parser() -> argparse.ArgumentParser:
 def main() -> int:
     args = build_parser().parse_args()
     try:
+        if args.no_reference and args.reference_commit:
+            raise HandoffError("无参考 PSP 时不能填写 --reference-commit")
         remote_verification = None
         if args.verify_remote:
             if not args.repository_url: