Schema titles with commas produce invalid C# identifiers

[HavenDV]

Description

When an OpenAPI schema has a title containing commas (or other special characters), AutoSDK uses the title to derive a C# type name and generates an invalid identifier.

Example OpenAPI Schema

EvalItemContentArray:
  title: "Eval item, content, array"
  type: array
  items:
    oneOf:
      - $ref: '#/components/schemas/InputTextContent'
      - $ref: '#/components/schemas/OutputTextContent'

The title "Eval item, content, array" (with commas) gets converted into an invalid C# identifier.

Current Workaround

In FixOpenApiSpec, the title is manually sanitized:

if (openApiDocument.Components.Schemas.TryGetValue("EvalItemContentArray", out var evalItemContentArray)
    && evalItemContentArray is OpenApiSchema evalSchema)
{
    evalSchema.Title = "Eval item content array";
}

Expected Behavior

AutoSDK should sanitize title values when using them to derive C# type/class names. Characters that are invalid in C# identifiers (commas, periods, special chars, etc.) should be stripped or replaced with spaces/underscores before generating the identifier.

Affected SDKs

• tryAGI/OpenAI (EvalItemContentArray schema has commas in title)