feat: establish standalone Argand Site Registry

scripts/check.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+# By Nic Weyand! Run from a checkout or an extracted source release.
+set -euo pipefail
+cd "$(dirname "${BASH_SOURCE[0]}")/.."
+export CARGO_BUILD_JOBS="${CARGO_BUILD_JOBS:-2}"
+export CARGO_TERM_COLOR=never
+registry_check_root="${ARGAND_REGISTRY_CHECK_OUTPUT:-$(mktemp -d -t site-registry-check.XXXXXXXX)}"
+mkdir -p "$registry_check_root"
+registry_check_root="$(cd "$registry_check_root" && pwd)"
+if [[ -e "$registry_check_root/fixture" ]]; then
+    echo 'Choose a new check output directory; fixture evidence is never overwritten.' >&2
+    exit 1
+fi
+
+cargo fmt --all -- --check
+cargo check --workspace --all-targets --locked --offline
+cargo clippy --workspace --all-targets --locked --offline -- -D warnings
+ARGAND_REGISTRY_E2E_OUTPUT="$registry_check_root/fixture" \
+    cargo test --workspace --locked --offline
+RUSTDOCFLAGS="${RUSTDOCFLAGS:-} -D warnings" \
+    cargo doc --workspace --no-deps --locked --offline
+python3 -m unittest discover -s tests -v
+cargo build --workspace --bins --examples --locked --offline
+cargo metadata --no-deps --format-version 1 --locked --offline > "$registry_check_root/metadata.json"
+registry_target="$(python3 -c 'import json,sys; print(json.load(open(sys.argv[1]))["target_directory"])' "$registry_check_root/metadata.json")"
+python3 scripts/check_consumers.py --binary "$registry_target/debug/argand-site-registry" \
+    --rust-example "$registry_target/debug/examples/lookup" --fixture "$registry_check_root/fixture"
+echo "All checks passed. Synthetic fixture evidence: $registry_check_root"