perf: remove unused tiktoken encodings from node_modules

Dockerfile

@@ -5,6 +5,8 @@ WORKDIR /app
 COPY package.json pnpm-lock.yaml ./
 RUN npm i -g --force pnpm@9
 RUN pnpm install --frozen-lockfile
+# Remove unused encodings from `js-tiktoken`
+RUN node scripts/cleanup-js-tiktoken.js
 
 COPY . .
 ENV NODE_OPTIONS="--max_old_space_size=2048"