Q67: in-flight requests reserve monthly quota

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/main/services/provider-background-service.ts

@@ -9,7 +9,7 @@ import {
   type ProviderAuthType,
   type ProviderExecutionMode,
 } from "../../shared/domain";
-import { currentProviderUsageWindow, PROVIDER_MONTHLY_LIMIT_MESSAGE, type ProviderObservedRateLimitState } from "../../shared/provider-runtime-domain";
+import type { ProviderObservedRateLimitState } from "../../shared/provider-runtime-domain";
 import { AuditService } from "./audit-service";
 import { AuthBrokerService, type ProviderSecretVault } from "./auth-broker-service";
 import { OperationsService } from "./operations-service";
@@ -249,14 +249,7 @@ export class ProviderBackgroundService {
       throw new Error("Provider background execution is disabled by feature flag.");
     }
     if (provider.background_enabled !== 1) throw new Error("Background execution is disabled for this provider policy.");
-    const window = currentProviderUsageWindow();
-    const usage = this.db.prepare(`
-      select request_count
-      from provider_usage_windows
-      where org_id = ? and provider_id = ? and window_start = ?
-    `).get(orgId, provider.id, window.start) as { request_count: number } | undefined;
-    const requestCount = usage?.request_count ?? 0;
-    if (requestCount >= provider.monthly_request_limit) throw new Error(PROVIDER_MONTHLY_LIMIT_MESSAGE);
+    this.requestStore.assertMonthlyCapacity(orgId, provider);
   }
 
   private normalizeWorkspaceId(orgId: string, workspaceId: string | null): string | null {