Support Microsoft Teams Workflows (Incoming Webhook – New) for Teams notifier (deprecating legacy Office 365 connector)

[sanjay-zeidlergroup]

Microsoft Teams is deprecating the legacy Office 365 Connector–based Incoming Webhooks on 31 December.
The current MS Teams notifier in exception_notification relies on this deprecated webhook format.

This PR updates the Teams notifier to support the new Microsoft Teams Workflows Incoming Webhook, which uses a different payload structure, ensuring notifications continue to work after the deprecation.

What Changed

• Updated Teams notifier payload to match Workflow Incoming Webhook requirements
• No changes to the public notifier API
• Existing behavior preserved where possible
• Added/updated tests for the new payload format

Reproduction / Verification

Before

1. Configure the MS Teams notifier using the existing (legacy) webhook
2. Trigger an exception
3. Notifications rely on deprecated connector format

After

1. Create a Microsoft Teams Workflow with an Incoming Webhook
2. Configure the notifier with the new webhook URL
3. Trigger an exception
4. Notification is successfully delivered to the Teams channel

Tests

• Added automated tests for Workflow webhook payload
• All existing tests pass
• Manually verified using a real MS Teams Workflow webhook