refactor(ui-react): unify main and admin sidebar behavior

fix(infra): ensure postgres container restarts after host reboot

ci: replace private registry with docker cache in CI

feat(ui-react): add admin sessions list and detail pages

test(ui-react): add tests for announcements admin panel

feat(ui-react): implement announcements admin panel

feat(ui-react): wire announcements feature flag to config

chore(deps): bump go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp

fix(ci): prevent SBOM artifact name collision in releases

chore: bump shellhub version to v0.24.1

feat(cli): add namespace inspect command

feat(cli): add namespace list command

fix(store): add missing "lt" operator to PG filter parser

fix(api): compute device online status in session queries

fix(api): place AND operator before connector filter in device list handler