feat: Add Outdoor Fair Attendee and Device management

- Implemented Outdoor Fair Attendee and Device entities, including their respective controllers, services, and mappers.
- Added statistics endpoint for Outdoor Fair data, allowing aggregation by day, week, month, or year.
- Introduced SQL scripts for creating tables and mock data for attendees and devices.
- Created a write-capable script for executing DML/DDL statements against the SHZ HighGo database.
- Enhanced the existing query capabilities to support both read and write operations.

.claude/skills/query-shz-highgo/scripts/modify.sh

@@ -0,0 +1,46 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Write-capable counterpart to query.sh. Runs a single DML/DDL statement
+# against the SHZ HighGo database through the SSH gateway. Read-only mode
+# is NOT applied — only use when an actual change is intended.
+
+skill_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+password_file="${HIGHGO_PASSWORD_FILE:-$skill_dir/.password}"
+
+ssh_host="root@124.243.245.42"
+psql_path="/opt/HighGo4.5.7-see/bin/psql"
+db_host="39.98.44.136"
+db_port="6023"
+db_name="highgo"
+db_user="sysdba"
+
+if [[ ! -r "$password_file" ]]; then
+  echo "HighGo password file is missing or unreadable: $password_file" >&2
+  exit 2
+fi
+
+if [[ $# -eq 0 ]]; then
+  echo "Usage: $0 'INSERT ...' | 'UPDATE ...' | 'DELETE ...' | 'CREATE ...' | 'ALTER ...' | 'DROP ...'" >&2
+  exit 2
+fi
+
+sql="$*"
+
+# Reject multiple statements — prevents a trailing destructive command from
+# being smuggled in after the intended one. A single optional trailing
+# semicolon is tolerated.
+sql_without_final_semicolon="${sql%;}"
+if [[ "$sql_without_final_semicolon" == *';'* ]]; then
+  echo "Rejected: multiple SQL statements are not allowed. Run them one at a time." >&2
+  exit 3
+fi
+
+password="$(<"$password_file")"
+sql_base64="$(printf '%s' "$sql" | base64 | tr -d '\n')"
+
+{
+  printf '%s\n' "$password"
+  printf '%s\n' "$sql_base64"
+} | ssh -o BatchMode=yes -o ConnectTimeout=10 "$ssh_host" \
+  "read -r PGPASSWORD; read -r SQL_BASE64; export PGPASSWORD; export PGOPTIONS='-c search_path=shz,public -c statement_timeout=30000'; SQL=\$(printf '%s' \"\$SQL_BASE64\" | base64 -d); exec '$psql_path' -X --no-psqlrc -h '$db_host' -p '$db_port' -U '$db_user' -d '$db_name' -v ON_ERROR_STOP=1 -P pager=off -c \"\$SQL\""