docs: new root as prior history lost (orphan + GC); ~215 commits not recoverable

scripts/castopod/status.sh

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+#!/usr/bin/env bash
+# Quick Castopod health — bounded network, no hangs.
+set -euo pipefail
+ROOT="$(cd "$(dirname "$0")" && pwd)"
+# shellcheck source=lib.sh
+source "${ROOT}/lib.sh"
+
+echo "== podman =="
+podman ps --filter name=koopa-castopod --format 'table {{.Names}}\t{{.Status}}\t{{.Ports}}' || true
+
+echo "== local backend :9020 =="
+code=$(cp_http_code "http://127.0.0.1:9020/health" || true)
+echo "local health → ${code:-000} (307 redirect to public is OK)"
+
+echo "== public =="
+# Note: do not put bare @url in curl -w; @ means "read file" in some curl contexts.
+for path in "/" "/@foss" "/@foss/feed.xml" "/@foss/episodes/four-freedoms"; do
+  url="${CP_BASEURL}${path}"
+  code=$(cp_http_code "$url")
+  printf '  %s → %s\n' "$url" "$code"
+done