Cannot resolve 2nd level of local $ref.

[lennver]

Environment

• Nuget Package: JsonSchema.Net
• Nuget Version: 4.0.0
• OS: Windows 10
• .Net Target: 7

Describe the bug
When adding a $ref inside a file that itself is a referenced file the grandhild schema fails to be resolved.

To Reproduce
See the attached files, or:
Create a schema with a @ref to another schema, that has a @ref to the yet another schema. Then evaluate it against a json file that follows the schema.

Expected behavior
It throws a JsonSchemaException "Cannot resolve base schema from https://json-everything.net/level2.json" where level2.json is the grandchild.

at Json.Schema.RefKeyword.Evaluate(EvaluationContext context) at Json.Schema.EvaluationContext.Evaluate() at Json.Schema.PropertiesKeyword.Evaluate(EvaluationContext context) at Json.Schema.EvaluationContext.Evaluate() at Json.Schema.RefKeyword.Evaluate(EvaluationContext context) at Json.Schema.EvaluationContext.Evaluate() at Json.Schema.PropertiesKeyword.Evaluate(EvaluationContext context) at Json.Schema.EvaluationContext.Evaluate() at Json.Schema.JsonSchema.Evaluate(JsonNode root, EvaluationOptions options) at Json.Schema.JsonSchemaExtensions.Evaluate(JsonSchema jsonSchema, JsonElement jsonElement, EvaluationOptions options) at Json.Schema.JsonSchemaExtensions.Evaluate(JsonSchema jsonSchema, JsonDocument jsonDocument, EvaluationOptions options) at UserQuery.Main(), line 14

Additional context

issueExample.zip

[gregsdennis]

I think you have actually just provided reproduction for #415.