fix: Update license validation endpoint and parameter - Change endpoint from /licenses/validate to /licenses/verify - Change parameter from license_key to key to match API specification

Author: VoxHash

lib/licensechain/services/license_service.rb

@@ -42,7 +42,8 @@ def revoke(license_id)
       def validate(license_key)
         Utils.validate_not_empty(license_key, 'license_key')
 
-        response = @client.post('/licenses/validate', { license_key: license_key })
+        # Use /licenses/verify endpoint with 'key' parameter to match API
+        response = @client.post('/licenses/verify', { key: license_key })
         response[:valid]
       end