ci(pre-commit): enforce presence of 'upload-time' field in uv.lock

Add a pre-commit hook to ensure all contributions use a uv.lock file
that contains the 'upload-time' field (older uv versions do not include that)

Refs: #2887

.pre-commit-config.yaml

@@ -155,6 +155,14 @@ repos:
         require_serial: true
         files: ^.github/workflows/.*$
 
+- repo: local
+  hooks:
+    - id: check-uv-upload-time
+      name: Check upload-time in uv.lock
+      entry: python3 scripts/check_uv_upload_time.py
+      language: system
+      files: ^uv\.lock$
+
 ci:
     autofix_commit_msg: 🎨 [pre-commit.ci] Auto format from pre-commit.com hooks
     autoupdate_commit_msg: ⬆ [pre-commit.ci] pre-commit autoupdate