Implements the MemoryProfiler class with:
- Real-time memory usage tracking and trend analysis
- Baseline/diff functionality for leak detection
- V8 heap snapshot capture to disk
- In-memory snapshot ring buffer (max 100)
- Periodic capture support with configurable intervals
Exports getMemoryProfiler() singleton used by server.ts endpoints:
- GET /api/memory/stats
- POST /api/memory/capture
- GET /api/memory/diff
- POST /api/memory/baseline
- POST /api/memory/heap-snapshot
- GET /api/memory/snapshots
Resolves bd-ch6.7 memory profiling plan.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
