Update model card with multi-market support documentation

Update model card with v3.1 - 33 quant modules, new regime detection, transaction costs, drawdown control, liquidity risk, data snooping guard, event study, cross-sectional factors, factor risk model

Fix YAML frontmatter - remove badge links causing flow indicator errors

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Complete end-to-end README.md for AlphaForge quant trading platform

Done few changes

Update README with v2.0 architecture, all components, and usage guide

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