fix(trace-viewer): use Uint8ArrayWriter to fix large trace loading

[cyphercodes]

Description

Replace TextWriter and BlobWriter with Uint8ArrayWriter in ZipTraceLoaderBackend to fix 'TypeError: Failed to fetch' errors when opening large traces (>10MB).

Problem

The zip.js TextWriter and BlobWriter classes internally use new Response(readableStream).blob() which fails in Chromium's Service Worker environment for large data (~10MB+). This causes the trace viewer to fail with:

• TypeError: Failed to fetch
• TypeError: Cannot close a ERRORED writable stream
• TypeError: Cannot set properties of undefined (setting 'outputSize')

Solution

Use Uint8ArrayWriter which accumulates chunks directly in memory, completely bypassing the new Response(readableStream).blob() path that fails in Service Workers.

Changes

• readText(): Use Uint8ArrayWriter + TextDecoder instead of TextWriter
• readBlob(): Use Uint8ArrayWriter + Blob constructor instead of BlobWriter

Fixes #39845

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