Change log for SLACK_AUDIT

Date Changes
2025-03-28 Enhancement:
- The Gsub pattern was updated to \\r\\n from \r\n to fix the problem of rn being stripped from the generated output.
- A conversion block was added to explicitly convert the details.type field to a string.
- Mapped actor.user.id to principal.user.userid.
- Mapped details.url_private to target.url.
- Mapped details.shared_with.channel_id target.labels.
- Mapped details.reason to security_result.description.
- Mapped details.previous_ip_address to principal.labels.
- Mapped details.previous_ua to principal.labels.
2023-10-27 Enhancement:
- Mapped details.reason to security_result.description.
2022-08-03 Enhancement:
- Modified mapping for prin_ip from principal.nat_ip to principal.ip.
2022-04-07 - Corrected mapping for product_object_id.
- Corrected the user mappings for second log format.