Add WASM UDF support

[silasbrookshaha]

Summary

• add a Wasm UDF config variant and feature-gated SQL expression support
• load exported WASM functions from the configured path and evaluate numeric i32/i64/f32/f64 arguments/results
• update the generated Dozer schema for !Wasm config

Scope

This covers the core execution path for numeric exported WASM functions. More complex AssemblyScript string/memory ABI support can build on this runtime path separately.

Tests

• PROTOC=/private/tmp/protoc-25.3/bin/protoc CARGO_TARGET_AARCH64_APPLE_DARWIN_LINKER=/private/tmp/drop-ld-classic.sh cargo check --locked -p dozer-sql-expression --features wasm
• PROTOC=/private/tmp/protoc-25.3/bin/protoc CARGO_TARGET_AARCH64_APPLE_DARWIN_LINKER=/private/tmp/drop-ld-classic.sh cargo test --locked -p dozer-types udf_yaml_deserialize
• PROTOC=/private/tmp/protoc-25.3/bin/protoc CARGO_TARGET_AARCH64_APPLE_DARWIN_LINKER=/private/tmp/drop-ld-classic.sh cargo test --locked -p dozer-sql-expression --features wasm wasm

/claim #1653
Closes #1653

[CLAassistant]

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[silasbrookshaha]

Demo GIF for the WASM UDF runtime path and targeted validation: