add decision record on blob storage schema design

docs/architecture-decision-record/blob-storage-schema-design.md

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+
+# Blob Storage Schema Design
+
+## Decision:
+
+Blobs will be stored in a Blob Storage using the schema /{ID}/{Name}, where:
+
+- **ID:** A unique identifier for the entity (e.g., user ID, product ID).
+- **Name:** The name or description of the specific file (e.g., profile_picture.png, invoice.pdf).
+
+## Conclusion:
+
+The `/{ID}/{Name}` schema provides a logical, scalable, and efficient way to organize blobs. It ensures clear grouping of related blobs, simplifies retrieval, and leverages a Blob Storage's hierarchical structure for better performance and management.