- Add HTTPWireProfile to sdk/pluginapi on HTTPRequest with wire_profile JSON tag
- Decode wire_profile in host callbacks for flat and nested RPC payloads
- Match header casing in httpwire ordered_conn and allow non-HTTP handshakes
- Apply wire profile settings (HTTP/1.1 enforcement, auto compression disable, header ordering) in plugin host HTTP client
- Preserve proxy configuration, custom TLS dialers, redirect handling, and connection lifecycle
Closes: #5062
Track when executor calls cross an upstream transport boundary and use that
signal to keep model/provider errors from being replaced by later local
preparation, selection, or internal failures.
Mark HTTP, websocket, relay, and usage-tracked transports as upstream
attempts, while avoiding marks for local validation, logging, missing
sessions, and successful websocket handshakes before request send.
Parse relative auth expiry metadata and adjust Antigravity refresh timing.
