Add scripts to build anatomy vocabulary

server/scripts/filter-hunspell-de.sh

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+#!/usr/bin/env bash
+#
+# Filter a word list to entries NOT recognised by hunspell-de. Uses
+# `hunspell -l` (list-unknown-words mode) — a single batch invocation,
+# orders of magnitude faster than per-word lookups.
+#
+# Multi-word input lines are split into words by hunspell; only the
+# individual unknown words are kept. That matches our gazetteer's
+# token-level matching model (see gazetteer/mod.rs).
+#
+# Dependencies: hunspell, hunspell-de-de (Debian: apt install hunspell
+# hunspell-de-de).
+#
+# Usage: ./filter-hunspell-de.sh <input> <output>
+
+set -euo pipefail
+
+if [[ $# -ne 2 ]]; then
+    echo "Usage: $0 <input> <output>" >&2
+    exit 1
+fi
+
+INPUT="$1"
+OUTPUT="$2"
+
+if ! command -v hunspell >/dev/null 2>&1; then
+    echo "Error: hunspell is not installed." >&2
+    echo "  Debian/Ubuntu: sudo apt install hunspell hunspell-de-de" >&2
+    exit 1
+fi
+
+# Sanity-check: is the de_DE dictionary available?
+if ! echo "Haus" | hunspell -d de_DE -a >/dev/null 2>&1; then
+    echo "Error: hunspell de_DE dictionary not available." >&2
+    echo "  Debian/Ubuntu: sudo apt install hunspell-de-de" >&2
+    exit 1
+fi
+
+# `hunspell -l` prints every unknown word from stdin, one per line.
+# Pipe through sort -u to drop duplicates (multi-word titles can share
+# tokens) and produce a stable output order.
+hunspell -d de_DE -l < "$INPUT" | sort -u > "$OUTPUT"