feat: markdown upload support — app/services/ingestion.py

app/services/ingestion.py

@@ -90,6 +90,8 @@ def _sniff_mime(filename: str, head: bytes) -> str:
         ".jpeg": "image/jpeg",
         ".tiff": "image/tiff",
         ".html": "text/html",
+        ".md": "text/markdown",
+        ".markdown": "text/markdown",
     }.get(ext, "application/octet-stream")