new: dev: hardening the registration process with removing the not activated registrations #14

docs/SCHEDULER.md

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+# Scheduled Tasks
+
+MineSeeker uses Symfony Scheduler for recurring maintenance work. The Docker
+Compose `scheduler` service runs the Scheduler worker continuously and is
+restarted automatically if it exits.
+
+## Pending-account cleanup
+
+`PurgeExpiredPendingUsersCommand` is scheduled every hour. It deletes only
+unverified users whose activation-token expiry has passed.
+
+To inspect the registered schedule locally:
+
+```bash
+php bin/console debug:scheduler
+```
+
+To run the cleanup manually without deleting data:
+
+```bash
+php bin/console app:users:purge-expired-pending --dry-run
+```
+
+The production worker is started by Docker Compose:
+
+```bash
+docker compose up -d scheduler
+docker compose logs -f scheduler
+```
+
+No host-level cron entry is required.