[Feature] Support Flink sourceIdleTime metric in Paimon Source

[xiangyuf]

Search before asking

• I searched in the issues and found nothing similar.

Motivation

We need sourceIdleTime metric to get the right currentFetchEventTimeLag metric. User also need sourceIdleTime metric to monitor how long the source table has not been updated.

Solution

No response

Anything else?

No response

Are you willing to submit a PR?

• I'm willing to submit a PR!

[qingfei1994]

Hi @xiangyuf, may I work on this issue?

[xiangyuf]

Hi @xiangyuf, may I work on this issue?

@qingfei1994 thx for volunteering, you can take this task. You can also work on this(#4244) if you have time.

[xiangyuf]

@JingsongLi Could you help assign this to @qingfei1994 ?