ACH MVP Release - Analysis of Competing Hypotheses

Complete implementation of ACH (Analysis of Competing Hypotheses) methodology:

Features:
- Full CRUD for ACH analyses with hypothesis management
- Interactive matrix for scoring evidence against hypotheses
- Logarithmic (Fibonacci) and linear scoring scales
- Real-time analysis with total calculations
- Evidence Library integration
- Professional UI with statistics dashboard
- Complete API backend with D1 database

Components:
- ACHPage: List view with search/filter
- ACHAnalysisForm: Create/edit with hypothesis manager
- ACHMatrix: Interactive scoring grid
- ACHAnalysisPage: Analysis detail view

Deployment: https://3a567b9b.researchtoolspy.pages.dev