Change log for COMMVAULT

Date Changes
2025-02-20 Enhancement:
- Added "gsub" to map "Occurrencetime" to "metadata.event_timestamp".
2025-01-22 Enhancement:
- Mapped "Commcellname" to "additional.fields".
- Mapped "Operation" to "metadata.description".
- Mapped "Companyname" to "principal.user.company_name".
- Mapped "machine_name" to "principal.hostname".
- Mapped "locale" to "additional.fields".
2024-10-08 Enhancement:
- Mapped "computer" to "principal.hostname" and "principal.asset.hostname".
2023-11-10 - Newly created parser.