chore(infra): remove night-scheduler service entirely [guardrail-change]

Deletes the night-scheduler (nightly auto-shutdown of services). It stopped
services at 22:00 and killed long-running jobs (e.g. bulk embedding) — net
hindrance. Removed: running container, compose service + hetzner override,
source dir, CI lint entry, rule doc.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docker-compose.yml

@@ -582,33 +582,6 @@ services:
     networks:
       - breakpilot-network
 
-  # =========================================================
-  # NIGHT SCHEDULER
-  # =========================================================
-  night-scheduler:
-    build:
-      context: ./night-scheduler
-      dockerfile: Dockerfile
-    container_name: bp-core-night-scheduler
-    ports:
-      - "8096:8096"
-    volumes:
-      - /var/run/docker.sock:/var/run/docker.sock
-      - ./night-scheduler/config:/config
-    environment:
-      COMPOSE_PROJECT_NAME: breakpilot-core
-      CONTAINER_PATTERN: "bp-*"
-      EXCLUDED_CONTAINERS: "bp-core-night-scheduler,bp-core-nginx,bp-core-postgres,bp-core-valkey"
-    healthcheck:
-      test: ["CMD", "curl", "-f", "http://127.0.0.1:8096/health"]
-      interval: 30s
-      timeout: 10s
-      start_period: 10s
-      retries: 3
-    restart: unless-stopped
-    networks:
-      - breakpilot-network
-
   # =========================================================
   # ADMIN CORE
   # =========================================================