Journalist?
Generic term is an administrator
Prehistoric event studier
and not the interior designer or event coordinator.
A catalyst is something or someone who sets things into motion.
You call them 'sequence of events'.
I want to report immigrants using someone elses documents.
"Scribe" typically refers to a person who copies or writes out documents by hand. In modern contexts, it can also refer to someone who transcribes or records information, such as during meetings or events.
The person who signs documents is typically referred to as a signatory or a signer.
Someone who participates in track events is typically referred to as a "track athlete." They may compete in various running events, such as sprints, middle-distance, or long-distance races, as well as field events like long jump or pole vault. In a broader sense, they can also be called a "runner."
What to do about someone who demanding money for my legal documents
A travel writer.
Documents or events that have impacted the growth of a community - and is properly documented (not always possible but is helpful) - are events worthy of historical recognition.