keep ERD simple

docs/diagrams/erd.mmd

@@ -1,35 +1,24 @@
 erDiagram
     CRYPTOGRAPHIC_KEY {
         string key_id PK
-        string key_value
         string key_type
         datetime created_at
         datetime expires_at
         string user_id FK
     }
 
-    METADATA {
-        string metadata_id PK
-        string blob_id FK
-        string key_id FK
-        datetime created_at
-        datetime updated_at
-        string encryption_algorithm
-        string content_type
-        int size
-        string user_id FK
-    }
-
     BLOB {
         string blob_id PK
         string blob_storage_path
         datetime upload_time
         string user_id FK
-        string file_name
-        int file_size
-        string file_type
+        string blob_name
+        int blob_size
+        string blob_type
+        string encryption_algorithm
+        string hash_algorithm
+        bool is_encrypted
+        bool is_signed
     }
 
-    CRYPTOGRAPHIC_KEY ||--o| METADATA : "used in"
     CRYPTOGRAPHIC_KEY ||--o| BLOB : "associated with"
-    BLOB ||--o| METADATA : "has metadata"