claude-mem v13.16.1 fixes a Windows process-tree leak that wedged port 37777 under dead PIDs

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Released 2026-08-26, this rollup of five fixes was validated on real Windows 11 hardware by a community tester who could reproduce the failure on demand. Worker shutdown now kills the entire uvx to uv to python to chroma-mcp chain on Windows and POSIX, with PID-identity checks so a recycled PID is never mistaken for the worker's own, ending zombie Python processes and a permanently wedged port 37777. Other fixes cover tree-sitter.exe resolution silently returning nothing on smart file reads, Windows tilde-path expansion, and a Git Bash preflight that now fails loudly in install and doctor instead of every hook crashing cryptically.