[BUG] yii1 bug with migration names

### Preflight Checklist

- [x] I have searched [existing issues](https://github.com/anthropics/claude-code/issues?q=is%3Aissue%20state%3Aopen%20label%3Abug) and this hasn't been reported yet
- [x] This is a single bug report (please file separate reports for different bugs)
- [x] I am using the latest version of Claude Code

### What's Wrong?

Do not allow the agent to generate migrations (file).

Either create the file yourself via protected/yiic migrate create or require the agent to use this command.
The agent uses the same pattern in the name when generating migrations
m260828_120000

Yii1 checks only 260828_120000 without the suffix. Therefore, 2 migrations created on the same day, even with different names - will not be applied!!

That is, if there is
m260901_120000_add_table.php
m260901_120000_add_column.php

Then only one of them will be executed, because Yii checks only 260901_120000

### What Should Happen?

Claude have to generate unique migration hash names instead of the same second parts: m260901_**120000**_

### Error Messages/Logs

```shell

```

### Steps to Reproduce

Say Claude to generate 2 migrations and check migration names.

### Claude Model

None

### Is this a regression?

Yes, this worked in a previous version

### Last Working Version

_No response_

### Claude Code Version

2.1.260

### Platform

Anthropic API

### Operating System

macOS

### Terminal/Shell

Terminal.app (macOS)

### Additional Information

_No response_

Start by reproducing the report: ask Claude to generate two Yii1 migrations, then compare their names with migrations created by protected/yiic migrate create. Inspect the migration-generation entry point and Yii1's timestamp parsing; done means two same-second migrations receive distinct names and both are applied.

Do mô hình lập chỉ mục viết ra từ nội dung của issue.