Improve chart engine (#8253)

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* Update core.ts

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* #7361

* delete network chart

* federationChart強化 apRequestChart追加

* tweak

packages/backend/src/services/chart/charts/ap-request.ts

@@ -0,0 +1,39 @@
+import autobind from 'autobind-decorator';
+import Chart, { KVs } from '../core';
+import { name, schema } from './entities/ap-request';
+
+/**
+ * Chart about ActivityPub requests
+ */
+// eslint-disable-next-line import/no-default-export
+export default class ApRequestChart extends Chart<typeof schema> {
+	constructor() {
+		super(name, schema);
+	}
+
+	@autobind
+	protected async queryCurrentState(): Promise<Partial<KVs<typeof schema>>> {
+		return {};
+	}
+
+	@autobind
+	public async deliverSucc(): Promise<void> {
+		await this.commit({
+			'deliverSucceeded': 1,
+		});
+	}
+
+	@autobind
+	public async deliverFail(): Promise<void> {
+		await this.commit({
+			'deliverFailed': 1,
+		});
+	}
+
+	@autobind
+	public async inbox(): Promise<void> {
+		await this.commit({
+			'inboxReceived': 1,
+		});
+	}
+}