refactor: remove empty services (#116)

* remove empty services

* remove old factory

* remove old static files

* cleanup more duplicate service code

* file/folder reorg

backend/internal/data/ent/has_id.go

@@ -0,0 +1,45 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import "github.com/google/uuid"
+
+func (a *Attachment) GetID() uuid.UUID {
+	return a.ID
+}
+
+func (at *AuthTokens) GetID() uuid.UUID {
+	return at.ID
+}
+
+func (d *Document) GetID() uuid.UUID {
+	return d.ID
+}
+
+func (dt *DocumentToken) GetID() uuid.UUID {
+	return dt.ID
+}
+
+func (gr *Group) GetID() uuid.UUID {
+	return gr.ID
+}
+
+func (i *Item) GetID() uuid.UUID {
+	return i.ID
+}
+
+func (_if *ItemField) GetID() uuid.UUID {
+	return _if.ID
+}
+
+func (l *Label) GetID() uuid.UUID {
+	return l.ID
+}
+
+func (l *Location) GetID() uuid.UUID {
+	return l.ID
+}
+
+func (u *User) GetID() uuid.UUID {
+	return u.ID
+}