MCPX MCP Gateway

@legacy Feature: Lunar Proxy concurrency-based throttling remedy Scenario: Concurrency limit is exceeded Given API Provider is up And Lunar Proxy is up When policies.yaml file is updated And policies.yaml includes a concurrency_based_throttling remedy for GET httpbinmock /delay/1 requests with 429 response_status_code and 2 max_concurrent_requests And policies.yaml file is saved And A local POST request (id apply_policies) is made to port 8081 at path /apply_policies And 3 concurrent requests (group A) to endpoint httpbinmock /delay/1 are made via Lunar Proxy And 2 concurrent requests (group B) to endpoint httpbinmock /delay/1 are made via Lunar Proxy Then 2 responses from group A have status code 200 And 1 responses from group A have status code 429 And 2 responses from group B have status code 200