fix(ralph-loop): ignore synthetic idle replays

src/plugin/session-status-normalizer.test.ts

@@ -25,6 +25,7 @@ describe("normalizeSessionStatusToIdle", () => {
 				type: "session.idle",
 				properties: {
 					sessionID: "ses_abc123",
+					synthetic: true,
 				},
 			},
 		})

src/plugin/session-status-normalizer.ts

@@ -18,7 +18,7 @@ export function normalizeSessionStatusToIdle(input: EventInput): EventInput | nu
 	return {
 		event: {
 			type: "session.idle",
-			properties: { sessionID },
+			properties: { sessionID, synthetic: true },
 		},
 	}
 }