feat(nestjs): Support WebSocket errors in SentryGlobalFilter

[psh4607]

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Fixes #16067

SentryGlobalFilter now handles WebSocket exceptions without delegating them to Nest's HTTP BaseExceptionFilter.

Unexpected gateway errors are captured with the auto.ws.nestjs.global_filter mechanism and emit a generic error response. Expected WsException responses are preserved without being reported to Sentry. WsException is detected by shape so @nestjs/websockets does not become a required dependency.

Unit and NestJS WebSocket E2E coverage was added for unexpected errors, expected WsException values, and HTTP exceptions raised in a WebSocket context.

Root cause: WebSocket exceptions were delegated to an HTTP exception filter which expects an HTTP adapter and cannot correctly respond through a WebSocket client.

[chargome]

Looks good overall, just some minor nits.

[nicohrubec]

did you run the e2e test locally? the reason I closed the original PR was that I couldn't make the e2e test pass reliably locally and it's also failing in CI now

[github-actions]

👋 @mydea, @s1gr1d — Please review this PR when you get a chance!

[chargome]

@psh4607 pinging you in case you want to push this further, otherwise we'll take over the pr next week

[psh4607]

Thanks for flagging this. The timeout was deterministic: Nest does not apply global APP_FILTER metadata to WebSocket gateways, so the test gateway never invoked SentryGlobalFilter. I attached the filter explicitly with @UseFilters(new SentryGlobalFilter()); the E2E suite now passes 4/4 across four local runs.

[psh4607]

@chargome Sorry for the delayed follow-up — I was away over the holiday break. This is my first contribution to sentry-javascript, so I’m excited to see it through. I’ve addressed the review comments and fixed the E2E issue. Thanks for your patience!