Unable to convert JSON to markdown(produces output file with identical to input conten)

Hi!

I am trying to convert a JSON file to Markdown. I am using the latest master(at the moment 0.1.2).

Installed with uv:

uv venv --python=3.12 .venv
source .venv/bin/activate
uv pip install -e 'packages/markitdown[all]'

Then run with

(.venv) ➜  markitdown git:(main) ✗ markitdown input.json -o output.md   

Expected result: markdown-formatted document
Actual result: plain JSON data in output.md file

input.json example

{
  "total": 11,
  "summary_by_risk": {
    "medium": 3,
    "high": 8
  },
  "summary_by_resolution": {
    "open": 11
  }
}

Reproduce the issue with the provided input.json and the markitdown input.json -o output.md command, then trace the JSON conversion path from the CLI entry point. Compare output.md with the expected Markdown representation and add or update coverage for this example; done means JSON input no longer produces an unchanged JSON file.