A rod panic during SearchImage propagated uncaught into fasthttp and killed the whole process: per-engine recover blocks only covered Search (5 of 6 engines had no recovery on SearchImage), and there was no Fiber
recover middleware.
Regression test: a panicking SearchImage returns 502 engine_internal and the server keeps serving.
Ecosia's search results are [in parts] provided by its own search index,
Staan, developed by the co-founded European Search Perspective (EUSP) --
https://en.wikipedia.org/wiki/Ecosia