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Raise an error when RemoteGraphClient URL is wrong

Jérémy Bobbio (Lunar) requested to merge lunar/swh-graph:4789-raise-error-for-wrong-http-client-url into master

We used to allow users to create a RemoteGraphClient with any URL. This gets surprising results if the HTTP server is up, but the location is wrong. As the HTTP Graph API will return 404 for unknown SWHIDs, a client can fail to notice the configuration problem and silently get wrong results.

Instead, we now query the /stats endpoint on instanciation and raise exceptions in case of 404, connection error or unexpected content in stats results.

Closes #4789 (closed)

Edited by Jérémy Bobbio (Lunar)

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