feat: add foreign key constraints and metrics for blockchain node

apps/pool-hub/migrations/env.py

@@ -0,0 +1,47 @@
+from __future__ import annotations
+
+import asyncio
+from logging.config import fileConfig
+
+from alembic import context
+from sqlalchemy.ext.asyncio import AsyncEngine, create_async_engine
+
+from poolhub.models import Base
+from poolhub.settings import settings
+
+config = context.config
+
+if config.config_file_name is not None:
+    fileConfig(config.config_file_name)
+
+target_metadata = Base.metadata
+
+
+def _configure_context(connection=None, *, url: str | None = None) -> None:
+    context.configure(
+        connection=connection,
+        url=url,
+        target_metadata=target_metadata,
+        literal_binds=True,
+        dialect_opts={"paramstyle": "named"},
+    )
+
+
+def run_migrations_offline() -> None:
+    _configure_context(url=settings.postgres_dsn)
+    with context.begin_transaction():
+        context.run_migrations()
+
+
+async def run_migrations_online() -> None:
+    connectable = create_async_engine(settings.postgres_dsn, pool_pre_ping=True)
+    async with connectable.connect() as connection:
+        await connection.run_sync(_configure_context)
+        await connection.run_sync(lambda conn: context.run_migrations())
+    await connectable.dispose()
+
+
+if context.is_offline_mode():
+    run_migrations_offline()
+else:
+    asyncio.run(run_migrations_online())