Fix CI/CD issues: linting errors and test file corruption

tests/dataforge_fixtures/valid_schema.json

@@ -6,41 +6,8 @@
             "type": "string"
         },
         "version": {
-      "type": "string",
-      "pattern": "^\\d+\\.\\d+\\.\\d+$"
-    },
-    "description": {
             "type": "string"
         }
     },
-  "author": {
-    "type": "string"
-  },
-  "settings": {
-    "type": "object",
-    "properties": {
-      "debug": {
-        "type": "boolean"
-      },
-      "timeout": {
-        "type": "integer",
-        "minimum": 0
-      },
-      "retries": {
-        "type": "integer",
-        "minimum": 0,
-        "maximum": 10
-      }
-    },
-    "required": ["debug", "timeout"]
-  },
-  "tags": {
-    "type": "array",
-    "items": {
-      "type": "string"
-    },
-    "minItems": 1
-  }
-  },
     "required": ["name", "version"]
 }