feat!: switch to built-in Sentry Deno server integration and upgrade deps

Upgrade Deno/JSR/npm dependencies (including Sentry 10.40, std libs, rolldown, msw) and update tests for newer MSW response helpers.

Remove custom Deno server/request Sentry instrumentation in `src/sentry.ts` because `denoServerIntegration` is now built into `@sentry/deno`.

BREAKING CHANGE: `src/sentry.ts` no longer exports/uses the custom `denoServerIntegration`, `instrumentDenoServe`, and related helpers. Consumers calling those functions directly must migrate to the built-in Sentry behavior.

Author: brc-dd