F3: Swagger Endpoint Verification
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Command: curl -s -o /dev/null -w "HTTP %{http_code}" http://localhost:8080/swagger/index.html
Result: HTTP 200 (SUCCESS)
Date: 2026-05-25

Additional verification:
  - Swagger HTML: <!DOCTYPE html><html lang="en"><head><meta charset="UTF-8">...
  - Swagger JSON: valid OpenAPI 2.0 spec with paths (/servers, etc.)
  - Server-core running: Up 8 seconds, port 8080 mapped

Container: nexusguard-server-core (built from fixed Dockerfile)
