chore(scripts): add discord daily digest

.env.example

@@ -2,3 +2,6 @@ DATABASE_URL=postgres://paperclip:paperclip@localhost:5432/paperclip
 PORT=3100
 SERVE_UI=false
 BETTER_AUTH_SECRET=paperclip-dev-secret
+
+# Discord webhook for daily merge digest (scripts/discord-daily-digest.sh)
+# DISCORD_WEBHOOK_URL=https://discord.com/api/webhooks/...

scripts/discord-daily-digest.sh

@@ -0,0 +1,74 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+REPO_ROOT="$(cd "$(dirname "$0")/.." && pwd)"
+cd "$REPO_ROOT"
+
+WEBHOOK_URL="${DISCORD_WEBHOOK_URL:-}"
+DATE="${1:-$(date +%Y-%m-%d)}"
+REPO_URL="https://github.com/paperclipai/paperclip"
+
+if [[ -z "$WEBHOOK_URL" ]]; then
+  echo "Error: DISCORD_WEBHOOK_URL env var is required" >&2
+  echo "Usage: DISCORD_WEBHOOK_URL=https://discord.com/api/webhooks/... $0 [date]" >&2
+  echo "  date defaults to today (YYYY-MM-DD format)" >&2
+  exit 1
+fi
+
+NEXT_DATE=$(date -j -v+1d -f "%Y-%m-%d" "$DATE" "+%Y-%m-%d" 2>/dev/null \
+  || date -d "$DATE + 1 day" "+%Y-%m-%d" 2>/dev/null)
+
+COMMITS=$(git log --since="${DATE}T00:00:00" --until="${NEXT_DATE}T00:00:00" master \
+  --format="%h|%s|%an" 2>/dev/null || true)
+
+if [[ -z "$COMMITS" ]]; then
+  PAYLOAD=$(cat <<ENDJSON
+{
+  "embeds": [{
+    "title": "📋 Daily Merge Digest — ${DATE}",
+    "description": "No commits were merged into \`master\` today.",
+    "color": 9807270
+  }]
+}
+ENDJSON
+)
+else
+  COMMIT_COUNT=$(echo "$COMMITS" | wc -l | tr -d ' ')
+
+  LINES=""
+  while IFS='|' read -r hash subject author; do
+    escaped_subject=$(echo "$subject" | sed 's/"/\\"/g' | sed 's/\\/\\\\/g')
+    LINES="${LINES}• [\`${hash}\`](${REPO_URL}/commit/${hash}) ${escaped_subject} — *${author}*\\n"
+  done <<< "$COMMITS"
+
+  PAYLOAD=$(cat <<ENDJSON
+{
+  "embeds": [{
+    "title": "📋 Daily Merge Digest — ${DATE}",
+    "description": "**${COMMIT_COUNT} commit(s)** merged into \`master\` today:\\n\\n${LINES}",
+    "color": 3066993,
+    "footer": {
+      "text": "paperclipai/paperclip • master"
+    }
+  }]
+}
+ENDJSON
+)
+fi
+
+if [[ "${DRY_RUN:-}" == "1" ]]; then
+  echo "$PAYLOAD" | python3 -m json.tool 2>/dev/null || echo "$PAYLOAD"
+  exit 0
+fi
+
+RESPONSE=$(curl -s -o /dev/null -w "%{http_code}" \
+  -H "Content-Type: application/json" \
+  -d "$PAYLOAD" \
+  "$WEBHOOK_URL")
+
+if [[ "$RESPONSE" == "204" || "$RESPONSE" == "200" ]]; then
+  echo "Discord digest posted for ${DATE} (${COMMIT_COUNT:-0} commits)"
+else
+  echo "Error: Discord webhook returned HTTP ${RESPONSE}" >&2
+  exit 1
+fi