Implements Reserve Risk as a new market indicator for Bitcoin.
## Formula
- Reserve Risk = Price / HODL Bank
- HODL Bank = cumulative Σ(Price - avg_VOCDD) over time
- VOCDD = CDD × Price (Value-weighted Coin Days Destroyed)
## Changes
- Added `vocdd` (Value-weighted CDD) to `cointime/value` module
- Created new `cointime/reserve_risk` module containing:
- `vocdd_365d_sma`: 365-day moving average of VOCDD
- `hodl_bank`: Cumulative opportunity cost of holding
- `reserve_risk`: Final ratio metric for timing accumulation
- Wired into cointime compute pipeline (price-dependent)
## Use Case
Reserve Risk measures long-term holder confidence.
Low values indicate high confidence and potential buying opportunity.
High values suggest overheated market conditions.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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