fix: add setting to fix mypy pydantic warning on vs code dev container setup (#4292)

Author: tjb1982

.devcontainer/devcontainer.json

@@ -25,6 +25,7 @@
         "python.formatting.autopep8Path": "/usr/local/py-utils/bin/autopep8",
         "python.formatting.blackPath": "/usr/local/py-utils/bin/black",
         "python.formatting.yapfPath": "/usr/local/py-utils/bin/yapf",
+        "mypy.runUsingActiveInterpreter": true
       },
       "extensions": [
         "charliermarsh.ruff",