feat(hierarchical): add HERCOpt (HERC) and NCOpt (NCO) portfolio allocation#742

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hass-nation:feat/herc-nco-hierarchical

Commits on Jun 27, 2026

feat(hierarchical): add HERCOpt and NCOpt portfolio allocation methods

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Commits on Jun 29, 2026

Fix _erc_weights_ccd: replace multiplicative update with Spinu (2013) CCD

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