- turned model_variables into a class with lazy loading

- some improvements to Healthchecks

config/config.py

@@ -137,6 +137,12 @@ class Config(object):
     MAIL_PASSWORD = environ.get('MAIL_PASSWORD')
     MAIL_DEFAULT_SENDER = ('eveAI Admin', MAIL_USERNAME)
 
+    # Langsmith settings
+    LANGCHAIN_TRACING_V2 = True
+    LANGCHAIN_ENDPOINT = 'https://api.smith.langchain.com'
+    LANGCHAIN_PROJECT = "eveai"
+
+
     SUPPORTED_FILE_TYPES = ['pdf', 'html', 'md', 'txt', 'mp3', 'mp4', 'ogg', 'srt']
 
     TENANT_TYPES = ['Active', 'Demo', 'Inactive', 'Test']