Cleanup FIML, enhance em_mvn()#303

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alyst wants to merge 16 commits intoStructuralEquationModels:develfrom

alyst:alyst/enhance_em_cor

Commits on Feb 16, 2026

FIML: SemFIMLPattern
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EM: optimizations

Alexey Stukalov
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EM MVN: decouple from SemObsMissing
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ObsMissing: docstring update

Alexey Stukalov
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EM MVN: further optimizations

Alexey Stukalov
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trunc_eigvals(): new helper func

Alexey Stukalov
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em_mvn(): min_eigval to enforce pos-def

Alexey Stukalov
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add ProgressMeter dep

Alexey Stukalov
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em_mvn(): verbose arg and progress bar

Alexey Stukalov
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test/fiml: set EM MVN rtol=1e-10
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SemObsMissing: fix obs_mean() test
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cleanup docstring

alyst
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Maximilian-Stefan-Ernst
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em_mvn(): cleanup docstring

Alexey Stukalov
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em_step!(): enforce symmetry

Alexey Stukalov
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trunc_eval(): check that mtx is sym, fix reconstruct

Alexey Stukalov
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FIML: fixup ws and msg indent
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