Normalize Guardian review cwd reuse keys (#34824)

## What changed

- Store the spawned session's working directory as a `PathUri` in
  `GuardianReviewSessionReuseKey` so reuse comparisons use its canonical URI
  representation.
- Assert that the reuse key contains the converted working directory.

GitOrigin-RevId: 68d440a37ebb310c610dabbb3373ed0ceff88dfa

codex-rs/core/src/guardian/review_session.rs

@@ -50,7 +50,7 @@ use crate::session::turn_context::TurnContext;
 use codex_config::types::McpServerConfig;
 use codex_features::Feature;
 use codex_model_provider_info::ModelProviderInfo;
-use codex_utils_absolute_path::AbsolutePathBuf;
+use codex_utils_path_uri::PathUri;
 
 use super::GUARDIAN_REVIEWER_NAME;
 use super::GuardianApprovalRequest;
@@ -168,7 +168,7 @@ struct GuardianReviewSessionReuseKey {
     base_instructions: Option<String>,
     user_instructions: Option<UserInstructions>,
     compact_prompt: Option<String>,
-    cwd: AbsolutePathBuf,
+    cwd: PathUri,
     mcp_servers: Constrained<HashMap<String, McpServerConfig>>,
     codex_linux_sandbox_exe: Option<PathBuf>,
     main_execve_wrapper_exe: Option<PathBuf>,
@@ -196,7 +196,7 @@ impl GuardianReviewSessionReuseKey {
             base_instructions: spawn_config.base_instructions.clone(),
             user_instructions,
             compact_prompt: spawn_config.compact_prompt.clone(),
-            cwd: spawn_config.cwd.clone(),
+            cwd: PathUri::from_abs_path(&spawn_config.cwd),
             mcp_servers: spawn_config.mcp_servers.clone(),
             codex_linux_sandbox_exe: spawn_config.codex_linux_sandbox_exe.clone(),
             main_execve_wrapper_exe: spawn_config.main_execve_wrapper_exe.clone(),
@@ -1286,6 +1286,10 @@ mod tests {
             /*user_instructions*/ None,
         );
 
+        assert_eq!(
+            cached_reuse_key.cwd,
+            PathUri::from_abs_path(&cached_spawn_config.cwd)
+        );
         assert_ne!(cached_reuse_key, next_reuse_key);
         assert_eq!(
             cached_reuse_key,