feat/PRWLR-3996 implement /tenants endpoint and basic filters logic (#14)

* chore: PRWLR-3996 add drf-jsonapi library to project

* feat: PRWLR-3996 implement /tenants endpoint and basic JSON:API spec

* feat: PRWLR-3996 implement new middleware to ingest metadata on API responses

* chore: PRWLR-3996 annotate views with drf-spectacular

* feat: PRWLR-3996 add cache-control to tenants endpoints

* feat: PRWLR-3996 update views filters

* chore: PRWLR-3996 remove meta middleware in favour of meta fields in serializers

* test(API): PRWLR-3996 add unit tests for /tenants

* chore: PRWLR-3996 turn DEBUG on on devel environment

* test: PRWLR-3996 rework tenants unit tests

* chore: PRWLR-3996 refactor filter classes

* fix(Backend,API): PRWLR-3996 use correct filter backend

src/backend/api/models.py

@@ -1,6 +1,7 @@
-from django.db import models
 import uuid
 
+from django.db import models
+
 
 class Base(models.Model):
     """
@@ -22,12 +23,3 @@ class Tenant(Base):
     """
 
     name = models.CharField(max_length=100)
-
-
-class TestModel(models.Model):
-    """To delete.
-
-    Use this model for development/testing purposes.
-    """
-
-    name = models.CharField(max_length=100)