feat(observability): 客户端提醒送达与权限走 Sentry

[gac0812]

Summary

• 提醒原生/JS 通道、厂商权限缺口改为客户端 Sentry 事件；Grafana 继续只画服务端 Prometheus。
• 未配置 EXPO_PUBLIC_SENTRY_DSN 时 SDK 保持关闭。
• 标签只用封闭枚举（厂商、权限、通道），不上报 session、账号、日程标题或坐标。

Related to #358

Test plan

• 未设置 DSN 时应用可启动，且不向 Sentry 发事件
• 原生闹钟响铃记录 native_ok，不重复记 js_channel
• JS 回退通道记录 js_channel，事件里没有日程标题
• 缺权限时记录封闭的 permission tags

Verification

cd frontend
npx jest tests/unit/infrastructure/observability tests/unit/shared/observability tests/architecture/sentryImportBoundary.test.ts tests/unit/features/reminder/application/LocalReminderApplication.test.ts --no-coverage

[codecov]

Codecov Report

❌ Patch coverage is 95.71429% with 12 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
...s/reminder/application/LocalReminderApplication.ts	94.78%	6 Missing ⚠️
...d/src/infrastructure/location/reminderGuardTask.ts	53.84%	6 Missing ⚠️

Flag	Coverage Δ
backend	96.59% <ø> (ø)
frontend	90.74% <95.71%> (+0.44%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
frontend/src/app/AppRoot.tsx	96.58% <100.00%> (+0.02%)	⬆️
frontend/src/app/composition/createAppServices.ts	100.00% <100.00%> (ø)
.../src/infrastructure/appState/RNAppStateProvider.ts	100.00% <100.00%> (ø)
...frastructure/notifications/NativeAlarmScheduler.ts	100.00% <100.00%> (ø)
...ucture/notifications/native/TimeflowAlarmBridge.ts	100.00% <100.00%> (ø)
...rastructure/observability/SentryClientTelemetry.ts	100.00% <100.00%> (ø)
...end/src/infrastructure/observability/initSentry.ts	100.00% <100.00%> (ø)
...nd/src/shared/observability/ClientTelemetryPort.ts	100.00% <100.00%> (ø)
...s/reminder/application/LocalReminderApplication.ts	93.15% <94.78%> (+0.66%)	⬆️
...d/src/infrastructure/location/reminderGuardTask.ts	64.70% <53.84%> (-0.16%)	⬇️

... and 2 files with indirect coverage changes

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[fennoai]

这次变更覆盖了客户端 Sentry 初始化、提醒送达/权限/生命周期埋点，以及 Android 原生失败缓冲；相关 Jest 验证通过。TypeScript 全量校验目前被一个新增的相对路径错误阻断，需先修复该导入后才能构建。