chore(release): release Buzz Desktop version 0.3.42

[wesbillman]

Buzz Desktop release v0.3.42

Changes since v0.3.41:

• fix(sidebar): scope channel sections storage to relay URL (#1477) (f9d06ae21)
• chore(mobile): declare non-exempt encryption usage in Info.plist (#1474) (453b8b1e4)
• fix(desktop): bind channel and thread context at compose time to prevent wrong-channel send (#1472) (d369ca9df)
• fix(relay-reconnect): resilient reconnect with fast-path, escalation, and polling (#1456) (02ff06cac)
• feat: per-community workspace icon set by admins, served via NIP-11 (#1463) (5bfd5ca27)
• perf(relay): batch outbound websocket data frames (#1464) (01b92faa1)
• Make reaction ingest atomic (#1458) (835302cc8)
• Serialize fan-out EVENT frames once (#1459) (3c661fb48)
• fix: agent reliability — no restart on channel-add, visible dead-letter notice (#1468) (d9c4e4aa7)
• fix(profile): consolidate agent profile runtime metadata (#1451) (c48006fc3)
• fix(desktop): simplify workspace rail badges (#1462) (e42dae3f9)
• perf(desktop): instant channel switching — non-blocking first paint, persisted snapshots (#1452) (deb3e6adc)
• perf(relay): bounded-concurrency multi-filter query execution (S2) (#1457) (a9e752e25)
• fix(desktop): classify timeline prepends so history loads don't bump unread (#1416) (9967b97f5)
• fix(desktop): quiet gate for workspace switches instead of boot splash (#1449) (b779a3ee2)
• fix(read-path): reach complete threads, dense-second timelines, and all people in the GUI (#1418) (7da936fff)
• E1+E3: reduce relay ingest/fan-out DB round trips; ack p99 −7–16%, fd p99 −6–28%, p999 tails −29–53% vs PR perf(relay): defer post-commit dispatch and avoid verify clone #1453 tip (#1454) (a504ad619)
• perf(relay): defer post-commit dispatch and avoid verify clone (#1453) (7bd3760c8)
• fix(relay): include git hook tools in runtime image (#1326) (88c089d3b)
• feat(chart): per-pod emptyDir git scratch when persistence disabled (multi-replica HA) (#1450) (c88799ac6)
• fix(relay): remove media bearer-token auth (#1444) (0701f47f4)
• fix(desktop): stop search shortcut from hijacking the sidebar (#1447) (15ad7ae87)
• fix(ci): set PGSCHEMA_PLAN_* in start-relay-for-tests.sh to avoid embedded-PG fetch (#1443) (89c4f7657)
• feat(desktop): restore observer-feed regressions from feat(desktop): rebuild agent activity feed around a classifier registry and twelve render classes #1381 and classify 4 new session/update types (#1412) (fec768436)
• fix(desktop): disable spellcheck/autocorrect/autocapitalize on emoji picker search (#1438) (bdeab23b5)
• feat(relay): add OpenTelemetry tracing, keep Prometheus metrics (#1398) (b1d9d955d)
• feat(buzz-agent): emit agent_thought_chunk for reasoning content (#1436) (9f2a11b33)
• feat(git): move repo-name registry to Postgres + relax RWM chart gate (HA relay) (#1432) (e5aa4a213)

To release: merge this PR. The tag and build will happen automatically.