Preserve Cloudfare HTTP cookies in codex (#17783)

## Summary
- Adds a process-local, in-memory cookie store for ChatGPT HTTP clients.
- Limits cookie storage and replay to a shared ChatGPT host allowlist.
- Wires the shared store into the default Codex reqwest client and
backend client.
- Shares the ChatGPT host allowlist with remote-control URL validation
to avoid drift.
- Enables reqwest cookie support and updates lockfiles.

codex-rs/Cargo.toml

@@ -294,7 +294,7 @@ ratatui = "0.29.0"
 ratatui-macros = "0.6.0"
 regex = "1.12.3"
 regex-lite = "0.1.8"
-reqwest = "0.12"
+reqwest = { version = "0.12", features = ["cookies"] }
 rmcp = { version = "0.15.0", default-features = false }
 runfiles = { git = "https://github.com/dzbarsky/rules_rust", rev = "b56cbaa8465e74127f1ea216f813cd377295ad81" }
 rustls = { version = "0.23", default-features = false, features = [