title: Is it possible to use a fluent-bit record's timestamp?
body: <p>I'm trying to create a fluent-bit config which uses a record's timestamp to a custom key using a filter. Something like:</p>
  <pre><code>[INPUT]
    Name tail
    Path /some/path
    ... 
  
  [FILTER]
    Name record_modifier
    Match *
    Record fluenbit_orig_ts SOME_MAGIC_WAY_TO_GET_UNIXTIME
  
  [OUTPUT]
    Name           stdout
    Match          *
  </code></pre>
  <p>The rationale for this that I'm using several parsers, each has its own time format (<code>Time_Format</code>, as it's used in the regular expression parser. Even if I used <code>Time_Keep</code>, it won't help because the time is specified differently by different services, with a different <code>Time_Format</code>). I'd like the records getting to an <code>[OUTPUT}</code> to have the same key to describe the timestamp. In this example that key would be <code>fluenbit_orig_ts</code></p>
  <p>Is this possible?</p>