Sensitive data/flag/padlock

## Summary
Component for highlighting pieces of sensitive data. Similar to a notification badge but for data.

## 💰 User value
Describe why this is important and how it will help users (either developers, designers or the end-users). Think about how it makes people's lives easier, more accessible or quicker to build stuff.

## 📚 User Stories
If relevant, describe the high-level functionality as user stories.

*As an* ICDS user:
*I need*
*So that*

## 📝 Acceptance Criteria
If relevant, describe in full detail the different interactions and edge cases that the component or patterns needs to fulfil.

*Given*
*When*
*Then*

## ✏ Designs
If there's a Figma design file (or other mock-up), include it here.

## 🧾 Guidance
If there's written guidance or documentation, include it here.

The issue describes a proposed sensitive-data highlighting component but does not name files, entry points, tests, designs, guidance, or concrete acceptance criteria. Start by locating the existing notification badge and related component patterns, then define the user value, interactions, designs, and completion criteria before implementation can be considered done.

Written by the indexing model from the issue text.