[deps] add pytest-randomly to run tests in random order

ATM it is intended for use in dev env, not test env.

On test/ci we want a more reproducable order (...I think).

requirements/prod.txt

@@ -6,15 +6,37 @@
 #    requirements upgrade
 #
 asgiref==3.8.1
+    # via
+    #   django
+    #   django-structlog
 django==5.2.3
+    # via
+    #   -r requirements/prod.in
+    #   django-extensions
+    #   django-structlog
 django-environ==0.12.0
+    # via -r requirements/prod.in
 django-extensions==4.1
+    # via
+    #   -r requirements/prod.in
+    #   django-structlog
 django-ipware==7.0.1
+    # via django-structlog
 django-structlog==9.1.1
-psycopg==3.2.7
-psycopg-binary==3.2.7
+    # via -r requirements/prod.in
+psycopg==3.2.9
+    # via -r requirements/prod.in
+psycopg-binary==3.2.9
+    # via psycopg
 psycopg-pool==3.2.6
+    # via psycopg
 python-ipware==3.0.0
+    # via django-ipware
 sqlparse==0.5.3
+    # via django
 structlog==24.4.0
-typing-extensions==4.13.2
+    # via
+    #   -r requirements/prod.in
+    #   django-structlog
+typing-extensions==4.14.0
+    # via psycopg-pool