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-compose-dev.yml

@@ -10,7 +10,7 @@ services:
     ports:
       - "9000:9000"
     depends_on:
-      database:
+      pgbouncer:
         condition: service_healthy
       redis:
         condition: service_healthy
@@ -32,6 +32,23 @@ services:
       timeout: 5s
       retries: 5
 
+  pgbouncer:
+    image: edoburu/pgbouncer
+    container_name: e_ticket_pgbouncer
+    volumes:
+      - ./docker/pgsql/pgbouncer-dev.ini:/etc/pgbouncer/pgbouncer.ini:ro
+      - ./docker/pgsql/userlist-dev.txt:/etc/pgbouncer/userlist.txt:ro
+    ports:
+      - "6432:6432"
+    depends_on:
+      database:
+        condition: service_healthy
+    healthcheck:
+      test: ["CMD-SHELL", "pg_isready -h 127.0.0.1 -p 6432 -U app"]
+      interval: 5s
+      timeout: 5s
+      retries: 5
+
   redis:
     image: redis:7-alpine
     container_name: e_ticket_redis
@@ -67,7 +84,7 @@ services:
     volumes:
       - .:/app
     depends_on:
-      database:
+      pgbouncer:
         condition: service_healthy
       redis:
         condition: service_healthy
@@ -162,7 +179,7 @@ services:
     volumes:
       - .:/app
     depends_on:
-      database:
+      pgbouncer:
         condition: service_healthy
       redis:
         condition: service_healthy