Change log for SIGNAL_SCIENCES_WAF

Date	Changes
2023-11-22	Enhancement: - Added a Grok pattern to validate "remoteIP". - Added on_error function for fields "tag.detector", "tag.link", "tag.location", "tag.redaction", "tag.type", and "tag.value1".
2023-09-16	Bug-Fix: - Added a condition check to avoid mapping negative values to "network.received_bytes" and "network.http.response_code".
2023-02-21	Bug-Fix - Added gsub to fix the issue of userid and username not displayed in the udm mapping of "target.user.user_display_name" and "target.user.userid", respectively.
2022-11-25	Enhancement - Enhanced the parser to support new log format.
2022-11-03	Enhancement - Mapped "created" to "metadata.timestamp". - Checked for not null conditions for following: "remoteIP", "responseSize", "uri", "remoteHostname","serverName","userAgent","method","remoteCountryCode","id" prior mapping to udm. - Mapped "eventType" to "metadata.product_event_type". - Mapped "message_data" to "metadata.description". - Mapped "username" to "target.user.user_display_name". - Mapped "userid" to "target.user.userid". - Mapped "attachments.Fields.Title" , "attachments.Fields.Value" to "metadata.ingestion_labels" key and value. - Mapped "msgData.detailLink" to "network.http.referral_url". - Mapped "msgData.name" to "target.resource.name". - Mapped "msgData.changes" to "target.resource.attribute.labels". - Mapped "msgData.reason" to "security_result.summary". - Mapped "msgData.conditions" to "security_result.description". - Mapped "msgData.sites" to "network.http.user_agent".