perf(matrix): lazy-load music-metadata parsing

extensions/matrix/src/matrix/send/media.ts

@@ -6,7 +6,6 @@ import type {
   TimedFileInfo,
   VideoFileInfo,
 } from "@vector-im/matrix-bot-sdk";
-import { parseBuffer, type IFileInfo } from "music-metadata";
 import { getMatrixRuntime } from "../../runtime.js";
 import { applyMatrixFormatting } from "./formatting.js";
 import {
@@ -18,6 +17,7 @@ import {
 } from "./types.js";
 
 const getCore = () => getMatrixRuntime();
+type IFileInfo = import("music-metadata").IFileInfo;
 
 export function buildMatrixMediaInfo(params: {
   size: number;
@@ -164,6 +164,7 @@ export async function resolveMediaDurationMs(params: {
     return undefined;
   }
   try {
+    const { parseBuffer } = await import("music-metadata");
     const fileInfo: IFileInfo | string | undefined =
       params.contentType || params.fileName
         ? {