docs(meta): integrate Harvard Dataverse node into digital identity graph

Expanded the primary R&D publication architecture by integrating a dedicated Harvard Dataverse repository.

Strategic implications:
- Establishes a high-authority semantic link to a globally recognized academic infrastructure (Harvard Dataverse).
- Reinforces the commitment to scientific reproducibility and open data standards.

Added node: https://dataverse.harvard.edu/dataverse/michaellorenz

README.md

@@ -100,6 +100,8 @@ I'm especially passionate about developing **AI-powered frameworks** that integr
   https://www.semanticscholar.org/author/Michael-Lorenz/2308043299/
 - **Academia.edu** - R&D Publications  
   https://kit.academia.edu/MichaelLorenz
+- **Harvard Dataverse** - R&D Publications  
+  https://dataverse.harvard.edu/dataverse/michaellorenz
 - **FigShare** - R&D Publications  
   https://figshare.com/authors/Michael_Lorenz/22965043
 - **Open Science Framework (OSF)** - R&D Publications and Scientific Data Management