Change log for ORACLE_DB

Date Changes
2024-09-25 Enhancement:
- Added support for new pattern of KV logs.
2024-07-24 Enhancement:
- Mapped "AUDIT_POLICY" as a single string to "additional.fields" instead of splitting it into multiple values.
2024-06-06 - Minor change in "principal.user.user_display_name".
2024-05-30 - Added support for exadata fields.
2024-04-03 - Added support for some attributes which were not covered.
2023-10-25 Enhancement:
- Mapped "LENGTH", "LOGOFFDEAD", "LOGOFFLREAD", "LOGOFFLWRITE", "LOGOFFPREAD", "SESSIONCPU", "CLIENT_TERMINAL" to "target.resource.attribute.labels".
- Mapped "ACTION" to "security_result.summary".
- Set "security_result.description" to "Success" when "RETURNCODE" is 0 or "STATUS" is 0.
- Set "security_result.description" to "Failure" when "RETURNCODE" is either 1 or -1, or "STATUS" is either 1 or -1.
- Mapped "principal.ip" and "principal.port" from "CLIENT_ADDRESS".
2022-10-13 Enhancement:
- Added grok pattern to handle SYSLOG and KV logs.
2022-08-01 Enhancement: Added mapping for following fields:
- "hostname" mapped to "principal.hostname".
- if "returncode" is "0" then security_result.action mapped to "ALLOW" else if it is "-1" then mapped to "BLOCK"
- "ACTION" mapped to "metadata.product_event_type".
- "DATABASE USER" mapped to "principal.user.user_display_name".
- "PRIVILEGE" mapped to "principal.user.attribute.permissions".
- "CLIENT USER" mapped to "target.user.user_display_name".
- "file_name" mapped to "target.file.full_path".
- "event_name" mapped to "metadata.product_event_type".
- "ACTION_NUMBER" mapped to "event.idm.read_only_udm.additional.fields".
- "length" mapped to "event.idm.read_only_udm.additional.fields".
- "DBID" mapped to "metadata.product_log_id".