fix(llvm): honor aggregate alignment specifications

[julia-script]

Summary

• parse and expose LLVM aggregate ABI and preferred alignment, including default, zero, duplicate, and 16-bit validation semantics
• apply the aggregate ABI minimum to unpacked anonymous and named structures while preserving packed, empty, stronger-field, and array behavior
• classify malformed layout input as InvalidInput and add pinned LLVM 22.1.8 and OpenSpec coverage

Verification

• openspec validate honor-llvm-aggregate-alignment --strict
• pnpm typecheck
• pnpm exec biome check .
• pnpm test
• pnpm check
• pnpm release:candidate

Linear: JUL-26

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Project	Deployment	Actions	Updated (UTC)
silk-effect-docs	Ready	Preview	Aug 29, 2026 5:24pm