v0.1.709

Fix C allocation alignment for SIMD values captured by closures or stored in references, recursive values, vectors, maps, lists, views, and coroutine environments. Region block payloads and relocated buffers now honor the allocated type, while scalar allocation accounting retains its existing behavior. The allocation probe also records typed allocations and alignment padding.

Add full UBSan regressions for SIMD storage, allocator growth, forwarded accounting, and concurrent allocation, with three negative controls. Add a SIMD closure parity fixture covering the interpreter, C, LLVM, and Wasm backends.

Bound dependency setup in the build matrix, integration groups, Pages, and Release workflows. Dependency installation retries once; cancellation and command lookup failures stop immediately. All 187 required CI gates remain enabled.

Validation includes 2,946 tests, a 246-program parity inventory, and compiler checks with Clang, GCC 14, and GCC 15.