Sentinel Vnet FL workbook for Traffic Analytics

[IshpreetKaur2002]

Change(s):
Added a new Microsoft Sentinel workbook: Azure Network Watcher - VNet Flow Logs (AzureNetworkWatcher-VnetFL.json)
Added preview images for the workbook (dark and light themes): AzureNetworkWatcher-VNetFLBlack.png and AzureNetworkWatcher-VNetFLWhite.png
Added workbook metadata entry in WorkbooksMetadata.json with data dependency on NTANetAnalytics

Reason for Change(s):
Introduces a new community workbook for analyzing Azure Virtual Network flow logs via Network Watcher Traffic Analytics. The workbook enables users to trace malicious traffic flows, drill down into protocols, source/destination IPs, machines, countries, and subnets, and identify weak VNet rules.

Testing Completed:
Workbook JSON validates and renders correctly in Microsoft Sentinel
Preview images display properly in both dark and light mode

Checked that the validations are passing and have addressed any issues that are present:
Yes

References:

• Guidance for Detection checks
• General contribution guidance
• PR validation troubleshooting

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[IshpreetKaur2002]

@microsoft-github-policy-service agree company="Microsoft"

[IshpreetKaur2002]

@microsoft-github-policy-service agree company="Microsoft"