DB Schema: Make layout pretty

Signed-off-by: David Mehren <git@herrmehren.de>
Co-authored-by: Yannick Bungers <git@innay.de>

docs/dev/db-schema.plantuml

@@ -1,9 +1,6 @@
 @startuml
-' hide the spot
 hide circle
-
+skinparam nodesep 60
-' avoid problems with angled crows feet
-skinparam linetype ortho
 
 entity "Note" {
   *id : uuid <<generated>>
@@ -132,21 +129,26 @@ entity "MediaUpload" {
   *createdAt : date
 }
 
-Note "1" - "1..*" Revision
+User "1" -- "0..*" Note: owner
+User "1" -u- "1..*" Identity
+User "1" - "1..*" authToken
+User "1" -l- "1..*" Session
+User "1" - "0..*" MediaUpload
+User "0..*" -- "0..*" Note
+User "1" - "0..*" Authorship
+
+(User, Note) . AuthorColors
+
 Revision "0..*" - "0..*" Authorship
 (Revision, Authorship) .. RevisionAuthorship
-Authorship "0..*" -- "1" User
+
-Note "0..*" -- "1" User : owner
-Note "1" -- "0..*" NoteUserPermission
-NoteUserPermission "1" -- "1" User
-Note "1" -- "0..*" NoteGroupPermission
-NoteGroupPermission "0..*" -- "1" Group
-Identity "1..*" -- "1" User
-authToken "1..*" -- "1" User
-Session "1..*" -- "1" User
-Note "0..*" -- "0..*" User : color
-(Note, User) .. AuthorColors
-Note "0..*" -- "0..*" Tag : tags
 MediaUpload "0..*"  -- "1" Note
-MediaUpload "0..*" -- "1" User
+Note "1" - "1..*" Revision
+Note "0..*" -l- "0..*" Tag
+Note "0..*" -- "0..*" Group
+
+User "0..*" -- "0..*" Note
+(User, Note) . NoteUserPermission
+(Note, Group) . NoteGroupPermission
+
 @enduml