@actual-app/cli `--format csv` Output Vulnerable to CSV Formula Injection via Custom `escapeCsv` Helper

Summary @actual-app/cli ships a hand-rolled CSV serializer in packages/cli/src/output.ts used whenever the global --format csv option is passed whose escapeCsv helper only handles RFC 4180 delimiter/quote/newline escaping. It does not neutralize the standard CSV formula-injection prefixes =, +, -...