Build Verse: a poem-quote app on the agent-native chat template

Adds a Postgres-backed quotes domain (poems/quotes/favorites) exposed as
five agent-native actions (list-quotes, get-random-quote, create-quote,
toggle-favorite, list-favorites) callable from both chat and the React UI
via useActionQuery/useActionMutation. Moves the primary UI from chat to a
mobile-first Quotes/Favorites experience (chat moves to /chat), adds
manual OpenTelemetry instrumentation exporting traces/metrics/logs over
OTLP, and wires a local Docker Postgres for shared state.

scripts/backup.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+# Nightly Postgres backup for verse-quote-app. Invoked by app-754b9a8a-backup.timer.
+set -euo pipefail
+
+BACKUP_DIR="/home/exedev/backups"
+RETENTION_DAYS=7
+TIMESTAMP="$(date -u +%Y%m%dT%H%M%SZ)"
+FILE="$BACKUP_DIR/verse-quote-app-$TIMESTAMP.sql.gz"
+
+mkdir -p "$BACKUP_DIR"
+
+docker exec verse-quote-app-postgres pg_dump -U versequote -d versequote | gzip > "$FILE"
+
+find "$BACKUP_DIR" -name 'verse-quote-app-*.sql.gz' -mtime +"$RETENTION_DAYS" -delete
+
+echo "Backed up verse-quote-app database to $FILE"