Conduct a deep research study on a realistic autonomy stack for Specus Village.

Context:
Specus Village should not promise full autonomy unless it is engineered and legally verified. We need a practical phased autonomy stack for energy, water, wastewater, internet, sensors, weather, safety and operations.

Research technologies and systems:
- grid power + backup
- solar
- batteries
- generators
- microgrids
- water wells
- rainwater harvesting
- water filtration
- wastewater / septic / treatment
- composting
- greywater reuse
- internet / fixed wireless / satellite
- sensors
- weather station
- air quality
- security and access control
- emergency communications

For each system analyze:
1. Minimum viable version.
2. Nice-to-have version.
3. Future version.
4. CAPEX.
5. OPEX / maintenance.
6. Failure modes.
7. Regulatory issues.
8. Staffing implications.
9. What claims can be made publicly.

Output:
Save / export the result as a Markdown file named:
DR-SV-36_Autonomy_Stack.md

The Markdown file must include:
- executive summary
- must-have / nice-to-have / future stack
- autonomy claims safety guide
- maintenance and risk table
- phase-one recommendation
- source links
- confidence levels
