Extract usage trends and reset logic into usage_tracking_helpers

backend/services/subscription/usage_tracking_helpers/__init__.py

@@ -0,0 +1,29 @@
+"""Helper utilities for usage tracking service."""
+
+from .usage_reset_helpers import reset_usage_summary_counters
+from .usage_stats_helpers import (
+    build_default_usage_percentages,
+    build_empty_usage_response,
+    build_provider_breakdown,
+    calculate_final_total_cost,
+    maybe_persist_reconciled_costs,
+)
+from .usage_trends_helpers import (
+    build_billing_periods,
+    build_usage_trends_response,
+    query_usage_summaries,
+    self_heal_summaries_from_logs,
+)
+
+__all__ = [
+    "build_default_usage_percentages",
+    "build_empty_usage_response",
+    "build_provider_breakdown",
+    "calculate_final_total_cost",
+    "maybe_persist_reconciled_costs",
+    "build_billing_periods",
+    "query_usage_summaries",
+    "self_heal_summaries_from_logs",
+    "build_usage_trends_response",
+    "reset_usage_summary_counters",
+]