docs: refresh Platform architecture diagram

src/explanation/data-pipelines.md

@@ -10,12 +10,12 @@ A **scientific data pipeline** extends beyond a database with computations. It i
 
 ## Pipeline Architecture
 
-A DataJoint pipeline integrates three core components:
+At the heart of every DataJoint pipeline is an **open-source core** of three components that handle schema, computation, and storage. The managed **DataJoint Platform** extends this core with services for AI access, data ingestion, exploration, security, collaboration, and visualization.
 
-![DataJoint Platform Architecture](../images/dj-platform.png/)
+![DataJoint Platform Architecture](../images/dj-platform.svg/)
 
-| Component | Purpose |
-|-----------|---------|
+| Open-Source Core | Purpose |
+|------------------|---------|
 | **Code Repository** | Version-controlled pipeline definitions, `make` methods, configuration |
 | **Relational Database** | System of record for metadata, relationships, and integrity enforcement |
 | **Object Store** | Scalable storage for large scientific data (images, recordings, signals) |