postgres healthcheck works

anaxi/postgres_tools.py

@@ -0,0 +1,27 @@
+import psycopg2
+from psycopg2.sql import SQL
+
+from anaxi.config import PostgresDatabaseConfig
+
+
+def create_postgres_connection_from_config(config: PostgresDatabaseConfig):
+    return psycopg2.connect(
+        dbname=config.dbname,
+        user=config.user,
+        password=config.password,
+        host=config.host,
+        port=config.port,
+    )
+
+
+def simply_query(config: PostgresDatabaseConfig, query: SQL):
+    with psycopg2.connect(
+        dbname=config.dbname,
+        user=config.user,
+        password=config.password,
+        host=config.host,
+        port=config.port,
+    ) as db_connection:
+        cursor = db_connection.cursor()
+        cursor.execute(query)
+        return cursor.fetchall()