Fetch Requirements from cloud (#10167)

Load requirements from Codex Backend. It only does this for enterprise
customers signed in with ChatGPT.

Todo in follow-up PRs:
* Add to app-server and exec too
* Switch from fail-open to fail-closed on failure

codex-rs/cloud-requirements/Cargo.toml

@@ -0,0 +1,26 @@
+[package]
+name = "codex-cloud-requirements"
+version.workspace = true
+edition.workspace = true
+license.workspace = true
+
+[lints]
+workspace = true
+
+[dependencies]
+async-trait = { workspace = true }
+codex-app-server-protocol = { workspace = true }
+codex-backend-client = { workspace = true }
+codex-core = { workspace = true }
+codex-otel = { workspace = true }
+codex-protocol = { workspace = true }
+tokio = { workspace = true, features = ["sync", "time"] }
+toml = { workspace = true }
+tracing = { workspace = true }
+
+[dev-dependencies]
+base64 = { workspace = true }
+pretty_assertions = { workspace = true }
+serde_json = { workspace = true }
+tempfile = { workspace = true }
+tokio = { workspace = true, features = ["macros", "rt", "test-util", "time"] }