* fix(sse): flatten structured (array) content in Qwen Web executor
foldMessages did String(m.content), turning OpenAI-style content-part arrays
into the literal "[object Object]" prompt. Add contentToText() to extract the
text parts. Reported on the support mesh.
TDD: red->green regression test tests/unit/qwen-web-content-array-serialization.test.ts
* docs(changelog): add fragment for #6927
* fix(stryker): register qwen-web content-array test in tap.testFiles
Fast Quality Gates flagged the new coverage for open-sse/executors/qwen-web.ts
as missing from stryker.conf.json's tap.testFiles list.
Co-authored-by: diegosouzapw <8016841+diegosouzapw@users.noreply.github.com>
