fix(sse): Anthropic OAuth 403 "Request not allowed" is a per-request refusal — cooldown with backoff instead of an instant ban (#12859) - #12864

fix(sse): Anthropic OAuth 403 "Request not allowed" is a per-request refusal — cooldown with backoff instead of an instant ban (#12859)#12864

diegosouzapw merged 10 commits into

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