MS Teams notifications fails with RequestEntityTooLarge

[MaxWinterstein]

Describe the bug

Some Notifications get eaten by the error RequestEntityTooLarge.

We use completely default notifications with the MS Teams sink.

Sometimes notifications fail because they are too large. I assume it's, e.g., the number of pod events that exceed the size limit.

I added some example screenshots below that AI reconstructed of the broken payload.

To Reproduce
Can't provide, sorry.

Expected behavior
The notification should be shrinked / cut to a fitting size.

Screenshots

[saisharan0103]

src/robusta/core/sinks/msteams/msteams_webhook_tranformer.py is the part I would inspect first, since the failure is on default MS Teams notifications when the rendered payload grows too large, plausibly from long pod event lists. For a PR, I would start by adding a size-aware truncation path before sending the webhook, preserving the main alert fields and cutting expandable/details content first. The regression test should build an oversized Teams payload and assert the transformed message is capped while still valid.