Add checkpoint logic and tests

.env.example

@@ -1,66 +0,0 @@
-IAAI_HEADLESS=true
-IAAI_LOG_LEVEL=INFO
-# IAAI_LOG_FILE=iaai_scraper.log
-
-# Network capture settings.
-IAAI_CAPTURE_SAME_ORIGIN_ONLY=true
-IAAI_MAX_CAPTURED_REQUESTS=40
-IAAI_MAX_CAPTURED_JSON_RESPONSES=30
-
-# Sequential listing-first mode.
-IAAI_CARS_LISTING_URL=https://www.iaai.com/Vehiclelisting/Cars
-IAAI_MAX_PAGES_PER_RUN=10
-IAAI_MAX_VEHICLES_PER_RUN=50000
-IAAI_PAGE_LINK_LIMIT=500
-IAAI_INCLUDE_PAGINATION=true
-IAAI_COLLECT_CURRENT_PAGE_ONLY=false
-
-# Паузы (отключены для максимальной скорости; включи на VPS если попадаешь под блокировки).
-IAAI_HUMAN_PACE_ENABLED=false
-IAAI_AFTER_LISTING_OPEN_MIN_S=0.2
-IAAI_AFTER_LISTING_OPEN_MAX_S=0.5
-IAAI_AFTER_FILTER_ACTION_MIN_S=0.2
-IAAI_AFTER_FILTER_ACTION_MAX_S=0.5
-IAAI_BEFORE_VEHICLE_OPEN_MIN_S=0.02
-IAAI_BEFORE_VEHICLE_OPEN_MAX_S=0.08
-IAAI_AFTER_VEHICLE_OPEN_MIN_S=0.02
-IAAI_AFTER_VEHICLE_OPEN_MAX_S=0.08
-IAAI_BETWEEN_VEHICLES_MIN_S=0.02
-IAAI_BETWEEN_VEHICLES_MAX_S=0.08
-IAAI_AFTER_PAGE_CHANGE_MIN_S=0.2
-IAAI_AFTER_PAGE_CHANGE_MAX_S=0.5
-
-# Sync settings
-IAAI_SYNC_ONLY_NEW=true
-IAAI_TOKENS_FILE=/data/tokens.json
-IAAI_RUNTIME_CONFIG_FILE=/app/runtime_config.json
-
-# Retry / backoff
-IAAI_RETRY_DELAY_SECONDS=2.5
-IAAI_RETRY_BACKOFF_MULTIPLIER=2.0
-IAAI_RETRY_JITTER_SECONDS=0.25
-
-# Proxy (HTTP/HTTPS preferred for Playwright)
-# Chromium does not support SOCKS5 proxy authentication directly.
-# Use residential or mobile USA proxy.
-# IAAI_PROXY_SERVER=http://proxy.example.com:8080
-# IAAI_PROXY_USERNAME=
-# IAAI_PROXY_PASSWORD=
-
-# Database (PostgreSQL).
-IAAI_DATABASE_URL=postgresql+psycopg2://iaai:iaai@postgres:5432/iaai_scraper
-IAAI_DATABASE_ECHO=false
-IAAI_DATABASE_POOL_SIZE=10
-IAAI_DATABASE_MAX_OVERFLOW=20
-
-# ─── Redis (Celery broker) ─────────────────────────────────
-IAAI_REDIS_URL=redis://redis:6379/0
-
-# ─── Celery ────────────────────────────────────────────────
-CELERY_BROKER_URL=redis://redis:6379/0
-CELERY_RESULT_BACKEND=redis://redis:6379/0
-CELERY_TASK_SOFT_TIME_LIMIT=600
-CELERY_TASK_TIME_LIMIT=900
-CELERY_WORKER_CONCURRENCY=1
-CELERY_BEAT_SYNC_INTERVAL_MINUTES=60
-CELERY_BEAT_SYNC_LIMIT=26