message: [health] Adding DB check to /health
diff: @@ -28,6 +28,7 @@ import pandas as pd
  import sqlalchemy as sqla
  from sqlalchemy import create_engine
  from sqlalchemy.engine.url import make_url
  +from sqlalchemy.exc import OperationalError
  from unidecode import unidecode
  from werkzeug.routing import BaseConverter
  from werkzeug.utils import secure_filename
  @@ -654,6 +655,11 @@ appbuilder.add_view(
  @app.route('/health')
  def health():
  + try:
  + db.session.execute('SELECT 1')
  + except OperationalError:
  + return Response('BAD', status=500)
  +
  return 'OK'
  