Stabilize staff concurrency and premium emoji; enable verified Drone deployment

scripts/check_schema.py

@@ -0,0 +1,27 @@
+"""Fail deployment if migrations or runtime table definitions are missing."""
+import asyncio
+import sys
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
+from alembic.config import Config
+from alembic.script import ScriptDirectory
+from sqlalchemy import select, text
+from src.core.database import engine, Base
+from src.core import models
+
+
+async def main():
+    expected = set(ScriptDirectory.from_config(Config("alembic.ini")).get_heads())
+    async with engine.connect() as connection:
+        actual = set((await connection.scalars(text("SELECT version_num FROM alembic_version"))).all())
+        if actual != expected:
+            raise RuntimeError("Database migrations are not at the release head")
+        for table in Base.metadata.sorted_tables:
+            await connection.execute(select(table).limit(0))
+    await engine.dispose()
+    print("Database schema verified")
+
+
+if __name__ == "__main__":
+    asyncio.run(main())