fix(tools): add error_kind to windows-gated bash ToolOutput literal

Phase 8 added `error_kind: Option<ToolErrorKind>` to ToolOutput, and
Phase 9 verified clippy clean on Linux. The Windows-only
`maybe_execute_simple_windows_http_command` in bash.rs — gated by
`#[cfg(windows)]` — was not visible to Linux clippy and its
`Some(ToolOutput { ... })` literal still missed the new field, so
the release.yml `CI Checks (Windows)` job failed cross-compile.

Trivial fix: add `error_kind: None` to that single literal. No
behaviour change — the Windows HTTP compat path never had a typed
error kind to surface in the first place.

This unblocks the v3.0.0 release pipeline.

Author: claude

core/src/tools/builtin/bash.rs

@@ -629,6 +629,7 @@ pub(crate) async fn maybe_execute_simple_windows_http_command(command: &str) ->
             "json_body": parsed.json_body,
         })),
         images: vec![],
+        error_kind: None,
     })
 }