v0.12.0 migrate sqlite3 to psql18, updated auth, deploy docs, account and replay updates

deploy/README.md

@@ -0,0 +1,18 @@
+# Deployment Scripts
+
+Run in this order; each script's header documents its inputs. The full guide is
+[doc/deployment.md](../doc/deployment.md).
+
+| Order | Where | Script | Purpose |
+|---|---|---|---|
+| 1 | Bastille host | `freebsd/host.sh <jail>` | `sysvshm=new` for PostgreSQL, jail restart |
+| 2 | Build machine | `make server-freebsd` | Static `bin/chess-server-freebsd-amd64` |
+| 3 | Jail (root) | `freebsd/setup-jail.sh` | PostgreSQL 18, database, account, service, backups, optional SQLite import |
+| 4 | Bastille host | `freebsd/nginx-chess.conf` | Location block for the host nginx |
+
+Supporting files, installed by `setup-jail.sh`:
+
+- `postgresql/setup.sql` — role, database, and schema (owner or split mode)
+- `postgresql/migrate-sqlite.sh` — one-time import of a v0.11 SQLite database
+- `freebsd/rc.d/chess_server` — `daemon(8)` service script
+- `freebsd/chess-backup.sh` — nightly `pg_dump` with 14-day retention