railway-n8n-config

## n8n Environment Variables (Railway) ### Execution data retention (added 2026-03-14) ``` EXECUTIONS_DATA_PRUNE=true EXECUTIONS_DATA_MAX_AGE=168 EXECUTIONS_DATA_SAVE_ON_SUCCESS=none EXECUTIONS_DATA_SAVE_ON_ERROR=all ``` - Auto-prunes execution history older than 7 days (168 hours) - Only saves failed executions to reduce database growth - Related: PostgreSQL WAL fix in `railway-postgres-setup.md` ## Architecture - Uses `railway` database on shared PostgreSQL instance - Redis for queue/caching - Worker + Primary setup