25.4.0-alpha2

What's Changed

• feat: rebuilt the Copilot Observability by @caalador in #411
• feat: always show the Copilot panel and load client scripts with @jsmodule by @totally-not-ai[bot] in #412
• fix: stop DB query observations when the connection closes by @caalador in #432
• fix: do not retain sessions and UIs dropped without a destroy event by @caalador in #433
• fix: Use route instead of class name by @caalador in #438
• fix: bound the error tag of the request and RPC timers by @caalador in #436
• fix: close off-request navigations, rate-limit per session, cap settings by @caalador in #437
• fix: possible unbounded memory growth from request data by @caalador in #431
• fix: clear bound state on service destroy and guard observation hooks by @caalador in #435
• fix: count resyncs from Flow events so the starter no longer needs spring-web by @totally-not-ai[bot] in #415
• ci: run workflows on ubuntu-26.04 by @totally-not-ai[bot] in #454
• refactor: time session locks from Flow lock events by @totally-not-ai[bot] in #450
• refactor: time RPC and data queries from Flow event durations by @totally-not-ai[bot] in #451
• refactor: time requests from Flow request events by @totally-not-ai[bot] in #453
• refactor: time navigations from Flow navigation events by @totally-not-ai[bot] in #452
• docs: navigation failures are not counted in vaadin.errors by @heruan in #455

Full Changelog: 25.4.0-alpha1...25.4.0-alpha2