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Omer Yahud
727181d026
Add --extproc-max-requests (default 2048) and set circuit_breakers.max_requests on the ext_proc cluster from it, replacing the implicit Envoy default and the hand-maintained doc coupling with a guarantee. Every request's header exchange occupies one slot briefly and every parked request holds one for its entire wait, so startup validation enforces extproc-max-requests >= parked-request-max — a breaker below the lot silently truncates it with Envoy-generated 503s that bypass parking.rejected. The default leaves the lot's worth of fast-path headroom (1024 lot / 2048 breaker), so a saturated lot cannot starve requests to already-running actors.