🧬 Model quality as multiplicative degradation across transforms

[szmyty]

Title: 🧬 Model quality as multiplicative degradation across transforms

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Description

Implement realistic quality propagation across transformation chains.

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Goals

• accurately represent cumulative quality loss
• prevent misleading additive quality calculations
• improve path selection accuracy

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Requirements

• represent transform quality as value between 0.0 and 1.0
• compute total path quality as product of all transform qualities
• integrate quality propagation into pathfinding logic
• ensure quality is included in scoring calculations

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Acceptance Criteria

• transform quality is defined and normalized
• path quality is computed multiplicatively
• quality propagation works across multi-step paths
• scoring uses correct total quality
• code compiles successfully