Add PgBouncer to dev and PgBouncer stats to admin Infra page

- Add pgbouncer service to docker-compose-dev.yml with dev config
- Route DATABASE_URL through pgbouncer:6432 in dev (matches prod)
- Add PgBouncer pools and stats tables to /admin/infra with color-coded
  avg query/xact times and client waiting indicators
- php, messenger, cron now depend on pgbouncer instead of database directly

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

docker/pgsql/pgbouncer-dev.ini

@@ -0,0 +1,19 @@
+[databases]
+e_ticket = host=database port=5432 dbname=e_ticket
+
+[pgbouncer]
+listen_addr = 0.0.0.0
+listen_port = 6432
+auth_type = md5
+auth_file = /etc/pgbouncer/userlist.txt
+pool_mode = transaction
+max_client_conn = 200
+default_pool_size = 20
+min_pool_size = 5
+reserve_pool_size = 5
+reserve_pool_timeout = 3
+server_lifetime = 3600
+server_idle_timeout = 600
+log_connections = 0
+log_disconnections = 0
+ignore_startup_parameters = extra_float_digits

docker/pgsql/userlist-dev.txt

@@ -0,0 +1 @@
+"app" "md56a422f785c9e20873908ce25d1736ae2"