fix: the build process may timeout when the message is too long

[piglei]

fix: the build process may timeout when the message is too long, changes include:

1. truncate the log message if it's too long (>4k) and only match the first 1k characters when doing step pattern matching
2. improve the step pattern by replacing "\s+" with "\s", the latter is much faster when searching a string with many blank characters
3. reduce the number of patterns by introducing re.IGNORECASE.