(fix) ProxyStartup - Check that prisma connection is healthy when starting an instance of LiteLLM (#6627)

* fix debug statements

* fix assert prisma_client.health_check is called on _setup

* asser that _setup_prisma_client is called on startup proxy

* fix prisma client health_check

* add test_bad_database_url

* add strict checks on db startup

* temp remove fix to validate if check works as expected

* add health_check back

* test_proxy_server_prisma_setup_invalid_db

litellm/proxy/proxy_server.py

@@ -3052,6 +3052,8 @@ class ProxyStartupEvent:
                 prisma_client.check_view_exists()
             )  # check if all necessary views exist. Don't block execution
 
+            # run a health check to ensure the DB is ready
+            await prisma_client.health_check()
         return prisma_client