CDN Bundle Compression

### Is there an existing issue for this?

- [x] I have checked for existing issues https://github.com/getsentry/sentry-javascript/issues
- [x] I have reviewed the documentation https://docs.sentry.io/
- [x] I am using the latest SDK release https://github.com/getsentry/sentry-javascript/releases

### How do you use Sentry?

Sentry Saas (sentry.io)

### Which SDK are you using?

@sentry/browser

### SDK Version

10.54.0

### Framework Version

_No response_

### Link to Sentry event

_No response_

### Reproduction Example/SDK Setup

The base CDN bundle doesn't appear to be gzipped. However, more specific bundles are compressed as expected. Here's the resulting network payload.

https://browser.sentry-cdn.com/10.54.0/bundle.min.js - 88.6 kb
https://browser.sentry-cdn.com/10.54.0/bundle.replay.logs.metrics.min.js - 71 kb
https://browser.sentry-cdn.com/10.54.0/bundle.logs.metrics.min.js - 31.6 kb

I see the same across all major browsers. The uncompressed size looks fine. You'll see there's no "Content-Encoding" header on the base bundle response.

### Steps to Reproduce

Inspect the provided URLs

### Expected Result

Compressed base bundle

### Actual Result

N/A

### Additional Context

_No response_

### Priority

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