test(imaging): retry transient edge failures instead of flaking the suite

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The cross-browser imaging job runs against the public origin, so every request
goes through Cloudflare. One chromium run of "rejects malformed figures ›
missing figure" came back 525 (Cloudflare: TLS handshake to the origin failed)
after a 40s stall — the request never reached the CMS, so a 400 was impossible
to observe and the assertion was effectively testing the network. It passed on
both firefox and webkit, which is the signature of an edge hiccup rather than a
regression.

`e2e/imaging/imaging-target.ts` now owns `getThroughEdge` / `fetchThroughEdge`,
which retry on the statuses that mean "the app was never reached"
(502/503/504 plus Cloudflare's 520-527) with a short backoff, and both
edge-fronted specs use them. A genuinely broken edge still exhausts the retries
and fails the run, so nothing is masked.

Verified: 84 passed / 21 skipped / 0 failed against epicnabbo.nl with
IMAGING_EDGE=1 across chromium, firefox and webkit.

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openhands committed 2026-10-15 20:30:38 +02:00

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commit 480343d5a5

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e2e/imaging/avatar-endpoint.spec.ts

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