enhance utilisation of postgres features

src/vctp.default

@@ -2,12 +2,12 @@ CPE_OPTS='-settings /etc/dtms/vctp.yml'
 
 # Aggregation engine selection (default: Go paths enabled).
 # DAILY_AGG_GO=1:
-#   Use the Go fan-out/reduce daily aggregation path.
+#   Force the Go fan-out/reduce daily aggregation path for manual runs.
 # MONTHLY_AGG_GO=1:
-#   Use the Go monthly aggregation path for both monthly modes
-#   (hourly or daily source tables, controlled by settings.monthly_aggregation_granularity).
-# Set either option to 0 to prefer the SQL implementation for that layer.
-# If a Go aggregation run fails, vCTP automatically falls back to SQL for that run.
+#   Force the Go monthly aggregation path for manual runs.
+# DAILY_AGG_SQL=1 / MONTHLY_AGG_SQL=1:
+#   Force legacy SQL fallback for manual runs.
+# Scheduled aggregation selection is controlled by settings.scheduled_aggregation_engine in YAML.
 DAILY_AGG_GO=1
 MONTHLY_AGG_GO=1
 # Additional runtime behavior is configured in the YAML file (`/etc/dtms/vctp.yml` by default).

src/vctp.yml

@@ -49,11 +49,18 @@ settings:
   snapshot_cleanup_cron: "30 2 * * *"
   hourly_snapshot_retry_seconds: 300
   hourly_snapshot_max_retries: 3
+  capture_write_batch_size: 1000
+  snapshot_table_compat_mode: true
+  async_report_generation: true
+  # Postgres-only: when true, vm_hourly_stats is migrated/managed as monthly range partitions.
+  postgres_vm_hourly_partitioning_enabled: false
+  # Scheduled aggregation engine: go (default) or sql (canonical Postgres SQL path rollout flag).
+  scheduled_aggregation_engine: "go"
   hourly_job_timeout_seconds: 1200
   hourly_snapshot_timeout_seconds: 600
   daily_job_timeout_seconds: 900
   monthly_job_timeout_seconds: 1200
-  monthly_aggregation_granularity: "hourly"
+  monthly_aggregation_granularity: "daily"
   monthly_aggregation_cron: "10 3 1 * *"
   # Optional: override Summary worksheet pivot layout in daily/monthly XLSX reports.
   # metric values: avg_vcpu, avg_ram, prorated_vm_count, vm_name_count