Install Guardian V2 in the app server (#38597)

## What changed

- Add `codex-guardian-v2` to the app server's dependencies.
- Install its feature-gated thread, approval-review, and tool lifecycle contributors with access to authentication and thread management.

GitOrigin-RevId: 25672032ccb541138c8c87c9f27f2a7423b2eee0

codex-rs/Cargo.lock

@@ -2015,6 +2015,7 @@ dependencies = [
  "codex-git-utils",
  "codex-goal-extension",
  "codex-guardian",
+ "codex-guardian-v2",
  "codex-home",
  "codex-hooks",
  "codex-http-client",

codex-rs/Cargo.toml

@@ -199,6 +199,7 @@ codex-extension-items = { path = "ext/items" }
 codex-goal-extension = { path = "ext/goal" }
 codex-git-attribution = { path = "ext/git-attribution" }
 codex-guardian = { path = "ext/guardian" }
+codex-guardian-v2 = { path = "ext/guardian-v2" }
 codex-image-generation-extension = { path = "ext/image-generation" }
 codex-external-agent-migration = { path = "external-agent-migration" }
 codex-experimental-api-macros = { path = "codex-experimental-api-macros" }

codex-rs/app-server/Cargo.toml

@@ -51,6 +51,7 @@ codex-features = { workspace = true }
 codex-goal-extension = { workspace = true }
 codex-git-attribution = { workspace = true }
 codex-guardian = { workspace = true }
+codex-guardian-v2 = { workspace = true }
 codex-git-utils = { workspace = true }
 codex-file-watcher = { workspace = true }
 codex-hooks = { workspace = true }

codex-rs/app-server/src/extensions.rs

@@ -80,7 +80,7 @@ where
             state_db,
             analytics_events_client,
             codex_otel::global(),
-            thread_manager,
+            thread_manager.clone(),
             goal_service,
             |config: &Config| GoalExtensionConfig {
                 enabled: config.features.enabled(codex_features::Feature::Goals),
@@ -95,6 +95,7 @@ where
         http_client_factory,
     );
     codex_guardian::install(&mut builder, guardian_agent_spawner);
+    codex_guardian_v2::install(&mut builder, auth_manager.clone(), thread_manager);
     codex_memories_extension::install(&mut builder, codex_otel::global());
     codex_mcp_extension::install(&mut builder);
     codex_mcp_extension::install_executor_plugins(&mut builder, environment_manager);