feat(FN-4393): complete Step 1 — add memory inclusion mode settings and resolver

Fusion-Task-Id: FN-4393
Fusion-Task-Lineage: 3615215d-9caa-4402-9258-a5a5de137dd6

packages/core/src/project-memory.ts

@@ -94,6 +94,7 @@ export async function ensureMemoryFile(rootDir: string): Promise<boolean> {
 type MemorySettings = {
   memoryEnabled?: boolean;
   memoryBackendType?: string;
+  agentMemoryInclusionMode?: "full" | "index" | "off";
   [key: string]: unknown;
 };