## Why
Destination restrictions and policy revocation must remain effective during redirects, response body reads, and established WebSocket traffic. Policy denials must also survive error handling so callers do not retry them or report a revoked operation as successful.
## What changed
- Route managed HTTP clients through a shared `RequestBuilder` and policy-aware execution, checking each redirect destination before route resolution and retaining a network permit while consuming response bodies.
- Guard WebSocket connection setup, reads, and writes with revocable permits, including independent wakeups for split readers and writers.
- Preserve `TransportError::Policy` through HTTP, SSE, and realtime error handling, and treat policy denials as non-retryable.
- Keep the supplied network policy in plugin startup HTTP requests and propagate response body failures from backend and plugin requests.
## Testing
Add regression coverage for rejection before connecting, revocation during redirect routing and streamed body reads, split WebSocket revocation, realtime writer error propagation, and revoked plugin upload responses.
GitOrigin-RevId: fba36700444c98a8364c09b4dc5452c4d78a90fb
## Why
WebSocket handshakes did not reuse the HTTP cookie store or retain response cookies, so routing cookies such as `__oailb` were unavailable to subsequent connections.
## What changed
- Reuse the HTTP factory's ChatGPT cookies for secure WebSocket handshakes, preserving explicit `Cookie` headers and marking generated headers sensitive.
- Retain allowlisted infrastructure cookies from both successful and rejected upgrades. Keep configured cookies scoped to their factory and exclude account and session cookies from the shared store.
- Apply HTTPS cookie scope to `wss` requests, preserving host and path restrictions and excluding insecure `ws` requests and non-ChatGPT hosts.
## Testing
Add HTTP/WebSocket cookie-sharing coverage and local TLS handshake tests for routing-cookie reuse across connectors, rejected-upgrade refreshes, explicit header precedence, cookie scope, session-cookie exclusion, and deletion.
GitOrigin-RevId: 6bd6afe16e97cf9758ca7ba207a4e88c969497a4
acrognale-oai