feat(memory-v2): close Phase A with auto-review, product events, and H5 recall UI.

Add candidate auto-review pipeline, shadow audit tooling, admin metrics page,
and user-visible memory recall hints in chat with phase-a readiness checks.

Co-authored-by: Cursor <cursoragent@cursor.com>

agent-run-gateway.mjs

@@ -1461,11 +1461,37 @@ export function createAgentRunGateway({
             memoryCount: Array.isArray(agentMemoryContext.memories)
               ? agentMemoryContext.memories.length
               : 0,
+            memoryPreviews: buildMemoryRecallPreviews(agentMemoryContext.memories),
             skipped: Boolean(agentMemoryContext.skipped),
             degraded: Boolean(agentMemoryContext.degraded),
             reason: agentMemoryContext.reason ?? null,
             latencyMs: Number(agentMemoryContext.latencyMs ?? 0),
           });
+          if (agentMemoryContext.injectionEnabled) {
+            const memoryCount = Array.isArray(agentMemoryContext.memories)
+              ? agentMemoryContext.memories.length
+              : 0;
+            void recordMemoryV2ProductEvent(pool, {
+              eventType: MEMORY_V2_PRODUCT_EVENT_TYPES.RESOLVED_INJECTED,
+              userId: row.user_id,
+              sessionId: row.agent_session_id ?? null,
+              runId,
+              data: {
+                mode: agentMemoryContext.mode,
+                memoryCount,
+                source: agentMemoryContext.source ?? null,
+              },
+            }).catch(() => {});
+            if (memoryCount > 0) {
+              void recordMemoryV2ProductEvent(pool, {
+                eventType: MEMORY_V2_PRODUCT_EVENT_TYPES.RECALL_HIT,
+                userId: row.user_id,
+                sessionId: row.agent_session_id ?? null,
+                runId,
+                data: { memoryCount, mode: agentMemoryContext.mode },
+              }).catch(() => {});
+            }
+          }
         }
       } catch (err) {
         console.warn(