Ingest schedule (#391)

Includes a new "app" running the ingestion jobs (aka fetch_news and
find_missing_companies + enrich_company_financials) on a schedule.

This also fixes an issue with the previous schedule implementation by
persisting the schedule in a file that survives new deployment and
continues where it left off.

local-docker-compose.yml

@@ -17,6 +17,9 @@ services:
       PYTHON_MONGO_PORT: ${PYTHON_MONGO_PORT:-27017}
       PYTHON_MONGO_DATABASE: ${PYTHON_MONGO_DATABASE:-transparenzregister}
       PYTHON_INGEST_SCHEDULE: ${PYTHON_INGEST_SCHEDULE:-4}
+      PYTHON_INGEST_SCHEDULE_FILE: ${PYTHON_INGEST_SCHEDULE_FILE:-/data/ingest_schedule.json}
+    volumes:
+    - ingest_data:/data
 
   mongodb:
     image: mongo:4.4.6
@@ -91,6 +94,7 @@ services:
 volumes:
   postgres_data:
   mongo_data:
+  ingest_data:
 
 networks:
   default: