[codex] Enable apply_patch freeform by default (#21687)

## Summary
- enable `apply_patch_freeform` by default in the feature registry

## Why
- make the freeform `apply_patch` tool available by default when model
metadata does not explicitly opt into another mode

## Validation
- `just fmt`
- did not run tests

---------

Co-authored-by: Codex <noreply@openai.com>

codex-rs/tools/src/tool_config.rs

@@ -222,7 +222,7 @@ impl ToolsConfig {
         let apply_patch_tool_type = match model_info.apply_patch_tool_type {
             Some(ApplyPatchToolType::Freeform) => Some(ApplyPatchToolType::Freeform),
             Some(ApplyPatchToolType::Function) => Some(ApplyPatchToolType::Function),
-            None => include_apply_patch_tool.then_some(ApplyPatchToolType::Freeform),
+            None => include_apply_patch_tool.then_some(ApplyPatchToolType::Function),
         };
 
         let agent_jobs_worker_tools = include_agent_jobs