Release 0.12.3 and fix Atalui Bloodletting scaling

[eriksegecs]

Summary

• cap Atalui's Bloodletting per-20-Life scaling so the extra physical damage tops out at 40%
• refresh exported data and changelog entry for the new gem behavior
• bump the manifest to version 0.12.3 with updated hashes

Testing

• not run (not requested)

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Codex Task

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Correct Bloodletting cap to match 40% text

The new stat map for Atalui’s Bloodletting sets limit = 20 on the per-life PerStat tag, and because limitTotal clamps the final mod value (see ModStore: limitTotal handling), the extra physical gain caps at 20% instead of the intended 40%. With a Life cost of 400 or more, the mod computes 2% × 20 = 40% but is immediately clamped to 20%, contradicting the changelog and the stat description (“up to 40%”). The limit should reflect the 40% cap rather than 20%.

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