Weights in alpha for FocalLoss#8665

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ytl0623 wants to merge 15 commits intoProject-MONAI:devfrom

ytl0623:fix-issue-8601

Commits on Jan 5, 2026

Merge branch 'dev' into fix-issue-8601
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Commits on Jan 6, 2026

Commits on Jan 7, 2026

Commits on Jan 8, 2026

Merge branch 'dev' into fix-issue-8601
ytl0623
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fix: When alpha is a sequence, each alpha[c] should be interpreted as the weight for positive samples of class c. Negative samples should have a default weight of 1.0
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