feat(core-testing): add RecordingRateLimit for test assertions

Captures consume + reset call arguments verbatim via consumeCalls and
resetCalls accessors. Uses local IRateLimit type alias (no core-shared
dep) following the recording-job-queue pattern.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/core-testing/src/rate-limit/recording-rate-limit.ts

@@ -0,0 +1,60 @@
+// Local type aliases matching the contracts in @repo/core-shared/rate-limit.
+// Kept inline to avoid a build-graph cycle between core-testing and core-shared
+// (mirrors the recording-job-queue pattern).
+
+type RateLimitDecision = {
+  allowed: boolean;
+  remaining: number;
+  resetAt: Date;
+};
+
+interface IRateLimit {
+  consume(
+    budgetName: string,
+    key: string,
+    weight?: number,
+  ): Promise<RateLimitDecision>;
+  reset(budgetName: string, key: string): Promise<void>;
+}
+
+export type RecordedConsumeCall = {
+  budgetName: string;
+  key: string;
+  weight: number | undefined;
+};
+
+export type RecordedResetCall = {
+  budgetName: string;
+  key: string;
+};
+
+const EPOCH = new Date(0);
+
+export class RecordingRateLimit implements IRateLimit {
+  readonly consumeCalls: RecordedConsumeCall[] = [];
+  readonly resetCalls: RecordedResetCall[] = [];
+
+  private _decision: RateLimitDecision = {
+    allowed: true,
+    remaining: Infinity,
+    resetAt: EPOCH,
+  };
+
+  withDecision(decision: RateLimitDecision): this {
+    this._decision = decision;
+    return this;
+  }
+
+  async consume(
+    budgetName: string,
+    key: string,
+    weight?: number,
+  ): Promise<RateLimitDecision> {
+    this.consumeCalls.push({ budgetName, key, weight });
+    return this._decision;
+  }
+
+  async reset(budgetName: string, key: string): Promise<void> {
+    this.resetCalls.push({ budgetName, key });
+  }
+}