feat: add WASM optimization step with wasm-opt#1
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Add spec for WASM optimization step using wasm-opt from the Binaryen toolchain. The optimization reduces contract binary size and lowers Stellar deployment costs. Spec covers: - Makefile optimize target running wasm-opt -Oz after cargo build - Pre/post size reporting with absolute and percentage savings - wasm-opt installation instructions in Makefile install target - README documentation for the optimization workflow - Correctness properties: size accuracy, source immutability, determinism - Property-based tests using proptest + shell integration tests
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Summary
Adds a spec for the WASM optimization build step using
wasm-optfrom the Binaryen toolchain. Optimizing the contract binary reduces its size and lowers Stellar deployment costs.What's included
make optimizetarget, size reporting, correctness preservation, and README docsAcceptance Criteria
make optimizecompletes successfully and exits 0trustlink_opt.wasm) is strictly smaller than the unoptimized binarycargo testunit testswasm-optmissing from PATH produces a descriptive error with install instructionsTesting Strategy