[SR] Masking improvements

[kahest]

WIP - TODO

• add current state of investigation (related to Compose?,...)
• add customer case link
• link to other related issues (save snapshots, snapshot testing,...)

internal ticket: https://www.notion.so/sentry/15a8b10e4b5d80c2bc86ec8ddfe51e46

[kahest]

for this we are currently waiting for more information from customer