Stabilize staff concurrency and premium emoji; enable verified Drone deployment

scripts/wait_database.py

@@ -0,0 +1,24 @@
+import asyncio
+import sys
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
+from sqlalchemy import text
+from src.core.database import engine
+
+
+async def main():
+    for attempt in range(30):
+        try:
+            async with engine.connect() as connection:
+                await connection.execute(text("SELECT 1"))
+            await engine.dispose()
+            return
+        except Exception:
+            if attempt == 29:
+                raise
+            await asyncio.sleep(1)
+
+
+if __name__ == "__main__":
+    asyncio.run(main())