chore: hypatia dispatch auto-fixes (tmp-paths, shell-quoting, annotations)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: hyperpolymath

elixir-mcp/scripts/mcp_tcp_smoke_test.sh

@@ -3,7 +3,7 @@ set -euo pipefail
 
 host=${MCP_HOST:-127.0.0.1}
 port=${MCP_PORT:-844}
-payload=${MCP_PAYLOAD:-/tmp/mcp-submit-feedback.json}
+payload=${MCP_PAYLOAD:-"$HYPATIA_TMPDIR/mcp-submit-feedback.json"}
 
 cat <<'JSON' >"$payload"
 {"jsonrpc":"2.0","id":"init","method":"initialize","params":{}}