test: add draft workflow coverage and sqlite migration helpers

deploy/sqlite_preview.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python3
+import json
+import sys
+from pathlib import Path
+
+
+def main(path: str) -> None:
+    payload = json.loads(Path(path).read_text(encoding='utf-8'))
+    for table, rows in payload.items():
+        print(f'-- {table}: {len(rows)} rows')
+        for row in rows[:2]:
+            print(row)
+
+
+if __name__ == '__main__':
+    if len(sys.argv) != 2:
+        print('Usage: sqlite_preview.py <export-json>')
+        raise SystemExit(1)
+    main(sys.argv[1])