feat: add cls sse example

[ianhu92]

正常响应：

php examples/cls/v20201016/ChatCompletions.php
Based on your retrieval analysis requirement "status code 200, count log entries", here is the CQL statement:

\```sql
status:200 | SELECT count(*) AS log_count
\```

**Explanation:**
1. The retrieval condition `status:200` filters logs with status code 200.
2. The SQL statement `SELECT count(*) AS log_count` counts the number of matching log entries.
3. The query validation check passed successfully.

**Query Validation Result:** Validation passed
[流式] 完成，开始非流式调用...
[非流式] 回复内容：
Based on your analysis requirements and log topic information, here is the CQL statement:

\```sql
status:200 | SELECT count(*) AS log_count
\```

**Explanation:**
1. **Retrieval condition**: `status:200` - This filters logs where the status field equals 200 (HTTP status code 200)
2. **Analysis part**: `SELECT count(*) AS log_count` - This counts the number of filtered logs and names the result as "log_count"
3. **Validation result**: The query syntax validation passed successfully.

**Notes:**
- The `status` field exists in your log topic index configuration (status:long::1) with statistics enabled
- This query will return the count of all logs with HTTP status code 200 within your specified time range
(base) ianhu@Ian-MacBook-Pro-M4-Pro tencentcloud-sdk-php % 

错误处理：

php examples/cls/v20201016/ChatCompletions.php

[流式] error {"Code":"ResourceNotFound.TopicNotExist","Message":"topic_id \"xxxxxxxx-xxxx\" does not exist."}

[流式] 完成，开始非流式调用...
[TencentCloud\Common\Exception\TencentCloudSDKException] code:ResourceNotFound.TopicNotExist message:topic_id "xxxxxxxx-xxxx" does not exist. requestId:3497f115-7e6b-4c37-ba91-c38026769b06