a gazillion things to implement cosmos db healthcheck

anaxi/cosmos_tools.py

@@ -0,0 +1,12 @@
+import azure.cosmos.cosmos_client as cosmos_client
+
+from anaxi.config import CosmosDBDatabaseConfig
+
+
+def create_cosmos_client_from_config(
+    config: CosmosDBDatabaseConfig,
+) -> cosmos_client.CosmosClient:
+    return cosmos_client.CosmosClient(
+        url=config.host,
+        credential={"masterKey": config.master_key},
+    )