Align Gloas builder API request auth types and bid request headers with builder-specs - #17372
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- Replace `builder_request_auths` on `BlockRequest` with a `BuilderConfig` carrying resolved `BuilderEntry`s (`url`, `auth`, `builder_pubkeys`, `max_execution_payment`, `min_bid`, `builder_boost_factor`), shaped to beacon-APIs#630 - Request auths now sign the entry's auth data (default: the UTF-8 bytes of its `url`) instead of the URL string, so the signed identity is decoupled from the HTTP dial target and a sidecar/proxy can front a builder - The beacon node routes bid requests by entry `url` and forwards the auth byte-for-byte; entries may share a `url` with distinct auth data, one request per entry - `SubmitBuilderPreferencesRequest` carries the dial `url` separately from the opaque auth data - The validator client resolves entries at propose time and signs on cache miss, so proposals no longer depend on a prior preference push - Per-entry limits ride the wire but are not yet enforced; the beacon still applies the pushed per-pubkey `max_execution_payment` (enforcement is the next PR in the stack) Second of the stack replacing OffchainLabs#17124, on top of OffchainLabs#17372.
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RequestAuthV1/SignedRequestAuthV1/BuilderPreferencesV1/BuilderPreferencesRequestV1to their unversioned spec names, andvalidator_pubkeytoproposer_pubkey, per builder-specs#165Date-MillisecondsandX-Timeout-Msheaders, both required by the spec