unified-exec: retain PathUri in command events (#28780)

## Why

App-server must report command events containing foreign-platform paths
without changing existing client or rollout path-string formats.

## What changed

- retain `PathUri` through exec command begin/end events
- convert cwd values to `LegacyAppPathString` at the app-server
compatibility boundary
- drop command actions with foreign paths and log them
- serialize rollout-trace cwd values using their inferred native path
representation
- restore Wine coverage for retained Windows cwd values and successful
completion

codex-rs/core/src/tools/events.rs

@@ -96,7 +96,7 @@ fn tracker_update_for_known_delta<'a>(
 pub(crate) async fn emit_exec_command_begin(
     ctx: ToolEventCtx<'_>,
     command: &[String],
-    cwd: &AbsolutePathBuf,
+    cwd: &PathUri,
     parsed_cmd: &[ParsedCommand],
     source: ExecCommandSource,
     interaction_input: Option<String>,
@@ -123,7 +123,7 @@ pub(crate) async fn emit_exec_command_begin(
 pub(crate) enum ToolEmitter {
     Shell {
         command: Vec<String>,
-        cwd: AbsolutePathBuf,
+        cwd: PathUri,
         source: ExecCommandSource,
         parsed_cmd: Vec<ParsedCommand>,
     },
@@ -146,7 +146,7 @@ impl ToolEmitter {
         let parsed_cmd = parse_command(&command);
         Self::Shell {
             command,
-            cwd,
+            cwd: PathUri::from_abs_path(&cwd),
             source,
             parsed_cmd,
         }
@@ -321,15 +321,11 @@ impl ToolEmitter {
                 },
                 stage,
             ) => {
-                // TODO(anp): Migrate exec command protocol events to PathUri.
-                let Ok(cwd) = cwd.to_abs_path() else {
-                    return;
-                };
                 emit_exec_stage(
                     ctx,
                     ExecCommandInput::new(
                         command,
-                        &cwd,
+                        cwd,
                         parsed_cmd,
                         *source,
                         /*interaction_input*/ None,
@@ -437,7 +433,7 @@ impl ToolEmitter {
 
 struct ExecCommandInput<'a> {
     command: &'a [String],
-    cwd: &'a AbsolutePathBuf,
+    cwd: &'a PathUri,
     parsed_cmd: &'a [ParsedCommand],
     source: ExecCommandSource,
     interaction_input: Option<&'a str>,
@@ -447,7 +443,7 @@ struct ExecCommandInput<'a> {
 impl<'a> ExecCommandInput<'a> {
     fn new(
         command: &'a [String],
-        cwd: &'a AbsolutePathBuf,
+        cwd: &'a PathUri,
         parsed_cmd: &'a [ParsedCommand],
         source: ExecCommandSource,
         interaction_input: Option<&'a str>,