fix: enforce IGDB multi-query limit

.changeset/enforce-multiquery-limit.md

@@ -0,0 +1,5 @@
+---
+"@api-wrappers/igdb-wrapper": patch
+---
+
+Reject typed multi-query builders that exceed IGDB's maximum of 10 query blocks per request.

src/__tests__/multi-query-limit.test.ts

@@ -0,0 +1,20 @@
+import { describe, expect, test } from "bun:test";
+import { IGDBValidationError } from "../errors";
+import { MultiQueryBuilder } from "../query/MultiQueryBuilder";
+
+describe("MultiQueryBuilder limits", () => {
+	test("allows at most the 10 queries supported by IGDB", () => {
+		let builder = new MultiQueryBuilder();
+
+		for (let index = 0; index < 10; index++) {
+			builder = builder.query("games", `query-${index}`, (query) =>
+				query.limit(1),
+			);
+		}
+
+		expect(builder.inspect().blocks).toHaveLength(10);
+		expect(() =>
+			builder.query("games", "query-10", (query) => query.limit(1)),
+		).toThrow(IGDBValidationError);
+	});
+});

src/query/MultiQueryBuilder.ts

@@ -88,6 +88,12 @@ export class MultiQueryBuilder {
 		build: QueryFactory<TModel>,
 		count: boolean,
 	): MultiQueryBuilder {
+		if (this.#blocks.length >= 10) {
+			throw new IGDBValidationError(
+				"multi-query supports at most 10 queries per IGDB request",
+			);
+		}
+
 		const normalizedName = name.trim();
 		if (!normalizedName) {
 			throw new IGDBValidationError("multi-query name is required");