fix(airflow): share logs volume between scheduler and api-server

The api-server couldn't fetch task logs because LocalExecutor runs tasks
in the scheduler process, writing logs to its local filesystem. The
api-server tried to fetch via HTTP but the scheduler's log server had
no hostname set. Fix by sharing a named volume for logs between both
containers so the api-server reads logs directly from the filesystem.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docker-compose.portainer.yml

@@ -197,6 +197,7 @@ services:
       AIRFLOW__CORE__DAGS_FOLDER: /opt/pipeline/dags
       AIRFLOW__CORE__LOAD_EXAMPLES: "false"
       AIRFLOW__CORE__SIMPLE_AUTH_MANAGER_USERS: "${AIRFLOW_ADMIN_USER:-admin}:admin"
+      AIRFLOW__LOGGING__BASE_LOG_FOLDER: /opt/airflow/logs
       PG_HOST: sc_database
       PG_PORT: "5432"
       PG_USER: ${DB_USERNAME}
@@ -205,7 +206,7 @@ services:
       TYPESENSE_URL: http://typesense:8108
       TYPESENSE_API_KEY: ${TYPESENSE_API_KEY:-changeme}
     volumes:
-
+      - airflow_logs:/opt/airflow/logs
     depends_on:
       sc_database:
         condition: service_healthy
@@ -230,6 +231,7 @@ services:
       AIRFLOW__CORE__DAGS_FOLDER: /opt/pipeline/dags
       AIRFLOW__CORE__LOAD_EXAMPLES: "false"
       AIRFLOW__CORE__SIMPLE_AUTH_MANAGER_USERS: "${AIRFLOW_ADMIN_USER:-admin}:admin"
+      AIRFLOW__LOGGING__BASE_LOG_FOLDER: /opt/airflow/logs
       PG_HOST: sc_database
       PG_PORT: "5432"
       PG_USER: ${DB_USERNAME}
@@ -238,7 +240,7 @@ services:
       TYPESENSE_URL: http://typesense:8108
       TYPESENSE_API_KEY: ${TYPESENSE_API_KEY:-changeme}
     volumes:
-
+      - airflow_logs:/opt/airflow/logs
     depends_on:
       sc_database:
         condition: service_healthy
@@ -275,3 +277,4 @@ volumes:
   kestra_storage:
   supplementary_data:
   typesense_data:
+  airflow_logs: