[BUG]: SciML simulation does not work

[YohannParis]

• Scenario: Simulate SciML
• Step:4.11
• Link to the project: https://app.staging.terarium.ai/projects/b0a98ccb-d186-449e-a703-e151dea3f18f/workflow/53e82f78-d902-4497-82cc-4f42367583f1

Describe the issue

[mwdchang]

The model-configuration here is not well-formed, the rates are missing expression_mathml which are parsed and used in sciml-service. @YohannParis @blanchco

See: https://elasticsearch.staging.terarium.ai/tds_modelconfiguration_tera_2.0/_doc/9a1d2db9-49e7-45b2-a164-94a67de81737

          "rates": [
            {
              "target": "s",
              "expression": "-beta * s * i"
            },
            {
              "target": "i",
              "expression": "beta * s * i - gamma * i"
            },
            {
              "target": "r",
              "expression": "gamma * i"
            }
          ],
          "initials": [
            {
              "target": "s",
              "expression": "1000",
              "expression_mathml": "<cn>1000</cn>"
            },
            {
              "target": "i",
              "expression": "2",
              "expression_mathml": "<cn>2</cn>"
            },
            {
              "target": "r",
              "expression": "0",
              "expression_mathml": "<cn>0</cn>"
            }
          ]