tools/analyze_dm.py scans 16-bit DM dumps for:
- Null regions (BSS, uninitialized memory)
- Q15 coefficient tables with range and average
- Periodic waveforms (sine/cosine lookup tables)
- ASCII strings
- Unclassified data regions with hex preview
Supports big-endian (default) and little-endian byte order.
Outputs DM word addresses for cross-reference with PM code.
