fix(core): improve SmartPdf lifecycle management and update dependencies

ts/provider.anthropic.ts

@@ -20,12 +20,15 @@ export class AnthropicProvider extends MultiModalModel {
   }
 
   async start() {
+    await super.start();
     this.anthropicApiClient = new plugins.anthropic.default({
       apiKey: this.options.anthropicToken,
     });
   }
 
-  async stop() {}
+  async stop() {
+    await super.stop();
+  }
 
   public async chatStream(input: ReadableStream<Uint8Array>): Promise<ReadableStream<string>> {
     // Create a TextDecoder to handle incoming chunks
@@ -178,11 +181,10 @@ export class AnthropicProvider extends MultiModalModel {
     messageHistory: ChatMessage[];
   }): Promise<{ message: any }> {
     // Convert PDF documents to images using SmartPDF
-    const smartpdfInstance = new plugins.smartpdf.SmartPdf();
     let documentImageBytesArray: Uint8Array[] = [];
 
     for (const pdfDocument of optionsArg.pdfDocuments) {
-      const documentImageArray = await smartpdfInstance.convertPDFToPngBytes(pdfDocument);
+      const documentImageArray = await this.smartpdfInstance.convertPDFToPngBytes(pdfDocument);
       documentImageBytesArray = documentImageBytesArray.concat(documentImageArray);
     }