[amarkdotdev]

Summary

Truncate the HTTP error response body before base64 encoding so knativeerrordata stays within the extension limit and the dispatcher no longer panics on large failure bodies (dead letter / reply paths).

Fixes #9504

Test plan

• go test ./pkg/kncloudevents/... -run TestSendEvent

[knative-prow]

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This pull-request has been approved by: amarkdotdev
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[knative-prow]

Welcome @amarkdotdev! It looks like this is your first PR to knative/eventing 🎉

[amarkdotdev]

Fixes #9504. Happy to iterate if you want a different truncation strategy.

[knative-prow]

Hi @amarkdotdev. Thanks for your PR.

I'm waiting for a knative member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work.

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