supabase / supabase / 26791848507

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feat(studio): add support to display realtime binary payloads (#46408)

## I have read the
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
file.

YES

## What kind of change does this PR introduce?

Add support to displaying binary payloads while displaying realtime
messages

<img width="2073" height="694"
alt="Realtime_Inspector___Realtime___29_APR___eduardo_gurgel_supabase_io_s_Org___Supabase"
src="https://github.com/user-attachments/assets/fcb5c3d2-f880-484b-97a9-b0ca3b939a3f"
/>

JSON payloads are untouched:

<img width="1744" height="625"
alt="Realtime_Inspector___Realtime___29_APR___eduardo_gurgel_supabase_io_s_Org___Supabase"
src="https://github.com/user-attachments/assets/8227d0af-21ee-4444-b8ca-4ebeeda11f75"
/>


How to test on staging:

```
   select
  realtime.send(
    '\x48656C6C6F2066726F6D205265616C74696D65'::bytea, -- Binary Payload
    'event', -- Event name
    'main', -- Topic
    false -- Public / Private flag
  );
```

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

* **New Features**
* Binary payloads in real-time message inspection show compact
placeholders with byte counts instead of raw binary.
* Added an inline hexdump viewer to inspect binary payload contents with
offsets, grouped hex bytes, and ASCII gutter.
* Message list and details view now use the placeholder/hexdump behavior
for payload rendering.

* **Tests**
* Added comprehensive tests for binary detection, hexdump formatting,
and placeholder substitution.

<!-- review_stack_entry_start -->

[![Review Change
Stack](https://storage.googleapis.com/coderabbit_public_assets/review-stack-in-coderabbit-ui.svg)](https://app.coderabbit.ai/change-stack/supabase/supabase/pull/46408?utm_source=github_walkthrough&utm_medium=github&utm_campaign=change_stack)

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<!-- end of auto-generated comment: release notes by coderabbit.ai -->

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