Refactor OpenAPI schema files by removing redundant type definitions for better clarity. Update bun.lock and package.json to include ajv as a new dependency. Add GitHub Actions workflow for automated testing of OpenAPI schemas across versions 2.0, 3.0, and 3.1.

package.json

@@ -40,6 +40,7 @@
     "schemas:validate": "echo 'Schema validation not yet implemented'"
   },
   "dependencies": {
+    "ajv": "^8.17.1",
     "rimraf": "^6.0.1",
     "spdx-license-list": "^6.10.0"
   },