Implements runtime telemetry tracking for dev server and application usage.
## New Features
### Runtime Telemetry
- Added telemetry middleware for automatic initialization
- Tracks dev server startup on first request
- Silent initialization - never blocks the application
- Exported telemetry service for manual tracking
### API Updates
- New middleware: `telemetryMiddleware`
- New function: `getTelemetry()` - access telemetry service
- Exported telemetry service and types from core
## Changes
**New Files:**
- packages/core/src/middleware/telemetry.ts
**Modified Files:**
- packages/core/src/middleware/index.ts - Export telemetry middleware
- packages/core/src/index.ts - Export telemetry APIs
- packages/core/tsup.config.ts - External crypto and posthog-node
- Version bumped: 2.1.0 → 2.2.0
## Usage
Users can now upgrade to get runtime telemetry:
\`\`\`bash
npm install @sonicjs-cms/core@latest
\`\`\`
The telemetry middleware will automatically track dev server starts
and other runtime events when the application is used.
Related to #304 (Phase 2)
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>