feat(s3): enhance logging and public URL generation

Add detailed logging for S3 uploads in user and content services. Improve public URL generation logic in `S3Service` by providing better handling for `API_URL`, `DOMAIN_NAME`, and `PORT`. Update relevant tests to cover all scenarios.

backend/src/media/media.controller.ts

@@ -9,13 +9,15 @@ export class MediaController {
 	@Get("*key")
 	async getFile(@Param("key") key: string, @Res() res: Response) {
 		try {
-			const stats = await this.s3Service.getFileInfo(key);
+			const stats = (await this.s3Service.getFileInfo(key)) as any;
 			const stream = await this.s3Service.getFile(key);
 
-			res.setHeader(
-				"Content-Type",
-				stats.metaData["content-type"] || "application/octet-stream",
-			);
+			const contentType =
+				stats.metaData?.["content-type"] ||
+				stats.metadata?.["content-type"] ||
+				"application/octet-stream";
+
+			res.setHeader("Content-Type", contentType);
 			res.setHeader("Content-Length", stats.size);
 			res.setHeader("Cache-Control", "public, max-age=31536000, immutable");