feat: web push notifications, offline indexeddb drafts, telemetry scrubbing, memoized stream sort

[Cyber-builder]

Summary of Changes

• app/streams/page.tsx (app/streams/page.tsx: add multi-column sorting (status, amount, rate, start time) to stream table #725): app/streams/page.tsx: add multi-column sorting (status, amount, rate, start time) to stream table
• IndexedDB Draft Streams Adapter (lib/offline-transactions.ts: add IndexedDB storage adapter for local offline draft streams #753): Added an asynchronous IndexedDB storage adapter in lib/offline-transactions.ts for draft stream batches to accommodate larger batches beyond localStorage limitations.
• PII / Stellar Key Scrubbing in Error Telemetry (lib/error-tracking.ts: filter sensitive wallet public keys before sending error telemetry #752): Added regex-based scrubbing in lib/error-tracking.ts to redact Stellar public (G...) and secret (S...) keys from error telemetry and breadcrumbs before dispatch.
• Memoized Multi-Key Stream Comparator (lib/stream-sort.ts: optimize stream list sorting using memoized multi-key comparator #751): Implemented cached comparator functions in lib/stream-sort.ts to optimize multi-key stream list sorting for high-frequency renders.

Closes #725
Closes #753
Closes #752
Closes #751

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