remove crap, erd and architecure diagram

- a bit of cleaning of useless files
- finished ERD diagram
- added architecture diagram
    - added to dossier as well

dossier/uml/architecture.md

@@ -0,0 +1,27 @@
+```mermaid +render
+architecture-beta
+    group back(Server)[HealhAI Back]
+    group api(cloud)[API] in back
+    group etl(cloud)[ETL] in back
+    group datavis(cloud)[Data visualisation] in back
+
+    service db(database)[Database] in api
+    service gunicorn(server)[gunicorn] in api
+    service grafana(cloud)[Grafana] in datavis
+    service django-admin(cloud)[Django Admin] in datavis
+    service redis(database)[Redis] in etl
+    service parser(server)[Parser] in etl
+
+    junction parserJunction in etl
+    junction redisJunction in etl
+
+    gunicorn:L -- R:db
+    parser:B -- T:redis
+    parser:R --> L:parserJunction
+    redis:R <-- L:redisJunction
+    parserJunction:B -- T:redisJunction
+    
+    grafana:T <-- B:db
+    django-admin:T -- B:gunicorn
+    gunicorn:T -- B:redisJunction 
+```