[AI Evaluation] Failed to parse score for 'Groundedness' from the following evaluation response:

### Description

Hi there! I'm reaching a similar error through Ollama (local model), Gemini, and via Amazon Bedrock, also it can be found by using `CompositeEvaluator` or directly by `GroundednessEvaluator` (and others)

Note: Via Gemini and Amazon Bedrock I'm using Semantic Kernel's connectors.

The error appears into the `Diagnostics` list.

## Ollama

Here is an example just using `Microsoft.Extensions.AI.*`, with local Ollama: [Microsoft.Extensions.AI.Evaluation.Tests.Ollama](https://github.com/henriqueholtz/Microsoft.Extensions.AI.Evaluation.Tests/tree/master/Microsoft.Extensions.AI.Evaluation.Tests.Ollama)

Ollama Error details

```
Expected evaluationMetric.Interpretation?.Rating to be one of {EvaluationRating.Good {value: 5}, EvaluationRating.Exceptional {value: 6}}
because -------------------------------------
Failed: False
Reason:
Interpretation Reason:
Interpretation Rating: Inconclusive
Diagnostics Count: 1: Failed to parse score for 'Groundedness' from the following evaluation response:
Let's think step by step:

1. The CONTEXT provides information about the order ID (123) and the tracking code (TKG_ABC).
2. The QUERY is a direct question about the tracking for the order 123.
3. The RESPONSE directly answers the query by providing the tracking information for the order 123.

Explanation: The response is completely relevant to the context and query, providing the exact information requested. Therefore, the score should be [Groundedness: 5].

Score: 5

-------------------------------------
Query: What is the tracking for the order 123?

-------------------------------------
ChatResponse: OrderId is 123, Tracking code is TKG_ABC.
, but found EvaluationRating.Inconclusive {value: 1}.
at AwesomeAssertions.Execution.LateBoundTestFramework.Throw(String message)
at AwesomeAssertions.Execution.DefaultAssertionStrategy.HandleFailure(String message)
at AwesomeAssertions.Execution.AssertionScope.AddPreFormattedFailure(String formattedFailureMessage)
at AwesomeAssertions.Execution.AssertionChain.FailWith(Func`1 getFailureReason)
at AwesomeAssertions.Execution.AssertionChain.FailWith(Func`1 getFailureReason)
at AwesomeAssertions.Execution.AssertionChain.FailWith(String message, Object[] args)
at AwesomeAssertions.Primitives.EnumAssertions`2.BeOneOf(IEnumerable`1 validValues, String because, Object[] becauseArgs)
at Microsoft.Extensions.AI.Evaluation.Tests.Ollama.CompositeEvaluatorTests.CompositeEvaluatorWithGroundednessEvaluatorTest() in D:\Repositories\Microsoft.Extensions.AI.Evaluation.Tests\Microsoft.Extensions.AI.Evaluation.Tests.Ollama\CompositeEvaluatorTests.cs:line 55
--- End of stack trace from previous location ---
```

## Gemini

Here is an example using `Microsoft.Extensions.AI.*` + `Microsoft.SemanticKernel.Connectors.Google` (which is currently in alpha version) with Gemini: [Microsoft.Extensions.AI.Evaluation.Tests.Gemini](https://github.com/henriqueholtz/Microsoft.Extensions.AI.Evaluation.Tests/tree/master/Microsoft.Extensions.AI.Evaluation.Tests.Gemini) - which is by default using `gemini-2.5-pro`.

Note: Not sure if the problem is coming from Semantic Kernel's connector or from `Microsoft.Extensions.AI.Evaluation.*`

Gemini Error Details

```
Expected evaluationMetric.Interpretation?.Rating to be one of {EvaluationRating.Good {value: 5}, EvaluationRating.Exceptional {value: 6}}
because -------------------------------------
Failed: False
Reason:
Interpretation Reason:
Interpretation Rating: Inconclusive
Diagnostics Count: 1: Failed to parse score for 'Groundedness' from the following evaluation response:
Let's think step by step:
1. **Analyze the Query:** The user wants to know the tracking code for a specific order, "order 123".
2. **Analyze the Context:** The context provides two pieces of information: "OrderId is 123"

-------------------------------------
Query: What is the tracking for the order 123?

-------------------------------------
ChatResponse: OrderId is 123, Tracking code is TKG_ABC.
, but found EvaluationRating.Inconclusive {value: 1}.
at AwesomeAssertions.Execution.LateBoundTestFramework.Throw(String message)
at AwesomeAssertions.Execution.DefaultAssertionStrategy.HandleFailure(String message)
at AwesomeAssertions.Execution.AssertionScope.AddPreFormattedFailure(String formattedFailureMessage)
at AwesomeAssertions.Execution.AssertionChain.FailWith(Func`1 getFailureReason)
at AwesomeAssertions.Execution.AssertionChain.FailWith(Func`1 getFailureReason)
at AwesomeAssertions.Execution.AssertionChain.FailWith(String message, Object[] args)
at AwesomeAssertions.Primitives.EnumAssertions`2.BeOneOf(IEnumerable`1 validValues, String because, Object[] becauseArgs)
at Microsoft.Extensions.AI.Evaluation.Tests.Gemini.CompositeEvaluatorTests.CompositeEvaluatorWithGroundednessEvaluatorTest() in D:\Repositories\Microsoft.Extensions.AI.Evaluation.Tests\Microsoft.Extensions.AI.Evaluation.Tests.Gemini\CompositeEvaluatorTests.cs:line 75
--- End of stack trace from previous location ---

```

---

### Reproduction Steps

#### Ollama

As mentioned in the [Ollama README](https://github.com/henriqueholtz/Microsoft.Extensions.AI.Evaluation.Tests/blob/master/Microsoft.Extensions.AI.Evaluation.Tests.Ollama/README.md):

- Run the ollama through docker: `docker run -d -v ollama:/root/.ollama -p 11434:11434 --name ollama ollama/ollama`
- Pull the llama2 model: `docker exec -it ollama ollama pull llama2`
- Run the tests

#### Gemini

As mentioned in the [Gemini README](https://github.com/henriqueholtz/Microsoft.Extensions.AI.Evaluation.Tests/blob/master/Microsoft.Extensions.AI.Evaluation.Tests.Gemini/README.md)

1. `dotnet user-secrets init --project ./Microsoft.Extensions.AI.Evaluation.Tests.Gemini/Microsoft.Extensions.AI.Evaluation.Tests.Gemini.csproj`
2. `dotnet user-secrets set "GeminiApiKey" "" --project ./Microsoft.Extensions.AI.Evaluation.Tests.Gemini/Microsoft.Extensions.AI.Evaluation.Tests.Gemini.csproj`
3. Run the tests

### Expected behavior

The score, interpretation etc should be parsed correctly

### Actual behavior

The score cannot be parsed

### Regression?

_No response_

### Known Workarounds

_No response_

### Configuration

- Windows
- .NET 9 SDK

### Other information

_No response_