[codex] Add plugin id to MCP tool call items (#23737)

Add owning plugin id to MCP tool call items so we can better filter them
at plugin level.

## Summary
- add optional `plugin_id` to MCP tool-call items and legacy begin/end
events
- propagate plugin metadata into emitted core items and app-server v2
`ThreadItem::McpToolCall`
- preserve plugin ids through app-server replay/redaction paths and
regenerate v2 schema fixtures

## Testing
- `just write-app-server-schema`
- `just fmt`
- `just fix -p codex-core`
- `cargo test -p codex-protocol -p codex-app-server-protocol`
- `cargo test -p codex-app-server-protocol`
- `cargo test -p codex-core mcp_tool_call_item_includes_plugin_id --lib`
- `cargo check -p codex-tui --tests`
- `cargo check -p codex-app-server --tests`
- `git diff --check`

## Notes
- `just fix -p codex-core` completed with two non-fatal
`too_many_arguments` warnings on the touched MCP notification helpers.
- A broader `cargo test -p codex-core` run passed core unit tests, then
hit shell/sandbox/snapshot failures in the integration target.
- A broader app-server downstream run hit the existing
`in_process::tests::in_process_start_clamps_zero_channel_capacity` stack
overflow; `cargo test -p codex-exec` also hit the existing sandbox
expectation mismatch in
`thread_lifecycle_params_include_legacy_sandbox_when_no_active_profile`.

codex-rs/protocol/src/protocol.rs

@@ -2186,6 +2186,9 @@ pub struct McpToolCallBeginEvent {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     #[ts(optional)]
     pub mcp_app_resource_uri: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    #[ts(optional)]
+    pub plugin_id: Option<String>,
 }
 
 #[derive(Debug, Clone, Deserialize, Serialize, JsonSchema, TS, PartialEq)]
@@ -2196,6 +2199,9 @@ pub struct McpToolCallEndEvent {
     #[serde(default, skip_serializing_if = "Option::is_none")]
     #[ts(optional)]
     pub mcp_app_resource_uri: Option<String>,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    #[ts(optional)]
+    pub plugin_id: Option<String>,
     #[ts(type = "string")]
     pub duration: Duration,
     /// Result of the tool call. Note this could be an error.
@@ -4536,6 +4542,7 @@ mod tests {
                 tool: "tool".into(),
                 arguments: json!({"arg": "value"}),
                 mcp_app_resource_uri: Some("app://connector".into()),
+                plugin_id: Some("sample@test".into()),
                 status: McpToolCallStatus::InProgress,
                 result: None,
                 error: None,
@@ -4554,6 +4561,7 @@ mod tests {
                     event.mcp_app_resource_uri.as_deref(),
                     Some("app://connector")
                 );
+                assert_eq!(event.plugin_id.as_deref(), Some("sample@test"));
             }
             _ => panic!("expected McpToolCallBegin event"),
         }
@@ -4641,6 +4649,7 @@ mod tests {
                 tool: "tool".into(),
                 arguments: json!({"arg": "value"}),
                 mcp_app_resource_uri: Some("app://connector".into()),
+                plugin_id: Some("sample@test".into()),
                 status: McpToolCallStatus::Completed,
                 result: Some(CallToolResult {
                     content: vec![json!({"type": "text", "text": "ok"})],
@@ -4664,6 +4673,7 @@ mod tests {
                     event.mcp_app_resource_uri.as_deref(),
                     Some("app://connector")
                 );
+                assert_eq!(event.plugin_id.as_deref(), Some("sample@test"));
                 assert_eq!(event.duration, Duration::from_millis(42));
                 assert!(event.is_success());
             }