refactor: update dependencies and remove unused code

- Added new dependencies: `adler2`, `crc32fast`, `flate2`, `miniz_oxide`, and `libredox`.
- Updated existing dependencies: `tokio-rustls` to version 0.26.4 and `filetime` to version 0.2.27.
- Removed the `backup.rs` file as it is no longer needed.
- Introduced tests for configuration and credential management.
- Enhanced the `identity` module to generate W3C compliant DID documents.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

RELEASE-NOTES-v0.5.0-beta.md

@@ -0,0 +1,84 @@
+# Archipelago v0.5.0-beta Release Notes
+
+**Release Date**: March 2026
+**Target Platform**: Debian 12 (Bookworm) — x86_64 and ARM64
+
+## Overview
+
+This is the first public beta of Archipelago, a self-sovereign Bitcoin Node OS. Flash it to a USB, install on any x86_64 or ARM64 machine, and manage your personal server through a modern web interface.
+
+## What's Included
+
+### Core System
+- Rust backend with RPC API and WebSocket real-time updates
+- Vue 3 frontend with glassmorphism UI design
+- Automated Podman container management
+- Nginx reverse proxy with HTTPS (self-signed cert)
+- Tor hidden services for all apps
+
+### App Store (16+ Apps)
+- **Bitcoin Stack**: Bitcoin Knots, Electrs, LND, BTCPay Server, Mempool, Fedimint
+- **Storage**: File Browser, Immich, PhotoPrism
+- **Productivity**: Penpot, SearXNG
+- **AI**: Ollama (local LLMs)
+- **Network**: Nostr Relay, Nginx Proxy Manager, Tailscale, Home Assistant
+- **Platform**: IndeedHub
+
+### Security
+- AES-256-GCM encrypted secrets on disk
+- Session management: 24h inactivity expiry, max 5 concurrent sessions
+- TOTP two-factor authentication with backup codes
+- Container hardening: read-only root, no new privileges, dropped capabilities
+- Pinned container image versions (no `:latest` tags)
+- Login rate limiting (5 attempts per 60 seconds per IP)
+- Path traversal prevention (nginx + client-side)
+- Cookie-based auth (no tokens in URLs)
+
+### Identity & Web5
+- Decentralized Identifier (DID) generation
+- Identity backup/restore
+- Nostr relay support
+
+### Performance
+- Backend startup: ~100ms
+- Frontend bundle: ~105 KB gzipped
+- WebSocket heartbeat with 30s ping/pong
+- Exponential backoff reconnection (max 30s)
+- Real-time install progress via WebSocket
+- Server-side 5-minute inactivity timeout for stale connections
+
+## Known Issues
+
+1. **ARM64 ISO**: ARM64 builds may require manual testing — primary testing is on x86_64
+2. **Bitcoin Initial Sync**: First blockchain sync takes 1-7 days depending on hardware
+3. **Self-signed HTTPS**: Browser shows certificate warning on first visit (expected)
+4. **Restore from Backup**: Not yet implemented in onboarding flow
+5. **Connect to Existing Server**: Not yet implemented in onboarding flow
+6. **Immich**: Stack installation may take 5+ minutes due to multiple container images
+7. **Memory**: Running all apps simultaneously requires 16+ GB RAM
+8. **Disk Space**: Full Bitcoin node + all apps requires 800+ GB
+
+## Upgrade Path
+
+This is a beta release. No upgrade path from beta to stable is guaranteed. Back up your data before installing.
+
+## System Requirements
+
+| Component | Minimum | Recommended |
+|-----------|---------|-------------|
+| CPU | 4 cores | 8+ cores |
+| RAM | 16 GB | 32 GB |
+| Storage | 500 GB SSD | 2 TB NVMe |
+| Network | Ethernet | Gigabit Ethernet |
+
+## Getting Started
+
+1. Download the ISO for your architecture
+2. Flash to USB with balenaEtcher or `dd`
+3. Boot from USB on target hardware
+4. Auto-installer runs — follow on-screen prompts
+5. After reboot, navigate to `http://<server-ip>` in your browser
+6. Complete the onboarding wizard
+7. Start installing apps from the App Store
+
+See [User Guide](docs/user-guide.md) for detailed instructions.