fix(auth): singleflight access schema initialization (#1953)

internal/cloud/access-control.ts

@@ -175,6 +175,11 @@ class AccessController {
     this.openFga = openFgaAuthorizer ?? createOpenFgaAuthorizer({ env, fetchImpl, now, configStore: store });
     this.userBilling = userBillingClient ?? createUserBillingClient({ env, fetchImpl });
     this.bootstrapAttempted = false;
+    if (typeof this.store?.ensureSchema === "function") {
+      this.store.ensureSchema().catch((error) => {
+        console.warn("access store schema warmup failed", error?.message ?? error);
+      });
+    }
   }
 
   configureCodeAgentWorkspaceContext({ env = null, fetchImpl = null, traceStore = null, codeAgentChatResults = null } = {}) {
@@ -1370,12 +1375,22 @@ class PostgresAccessStore extends MemoryAccessStore {
     super({ now });
     this.query = query;
     this.schemaReady = false;
+    this.schemaReadyPromise = null;
   }
 
   async ensureSchema() {
     if (this.schemaReady) return;
-    for (const sql of ACCESS_SCHEMA_STATEMENTS) await this.query(sql, []);
-    this.schemaReady = true;
+    if (!this.schemaReadyPromise) {
+      this.schemaReadyPromise = (async () => {
+        for (const sql of ACCESS_SCHEMA_STATEMENTS) await this.query(sql, []);
+        this.schemaReady = true;
+      })();
+    }
+    try {
+      await this.schemaReadyPromise;
+    } finally {
+      if (!this.schemaReady) this.schemaReadyPromise = null;
+    }
   }
 
   async countUsers() { await this.ensureSchema(); const result = await this.query("SELECT COUNT(*)::int AS count FROM users", []); return Number(result.rows?.[0]?.count ?? 0); }