add usage thin usage stat for metalab projects

docs/THINGS.md

@@ -32,6 +32,7 @@ $ curl https://metalab.at/things/usage/prusaxl -H "X-TOKEN: XXX" -XPOST -d 'user
 * `LOGOUT`, user stopped using a machine
 * `USAGE_MEMBER`, user used the machine for X seconds, for a member
 * `USAGE_NONMEMBER`, user used the machine for X seconds, for a non-member
+* `USAGE_METALAB`, user used the machine for X seconds, for a metalab infra project
 
 Additionally, supply `usage_seconds=` as an integer for `USAGE_` kinds.
 

things/migrations/0008_alter_thingevent_kind.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.2.20 on 2024-03-09 21:15
+
+from django.db import migrations
+from django.db import models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('things', '0007_alter_thingevent_usage_seconds'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='thingevent',
+            name='kind',
+            field=models.CharField(choices=[('LOGIN', 'Login'), ('LOGOUT', 'Logout'), ('USAGE_MEMBER', 'Zeit (Member)'), ('USAGE_NONMEMBER', 'Zeit (Nicht-Member)'), ('USAGE_METALAB', 'Zeit (für Metalab)')], db_index=True, max_length=32),
+        ),
+    ]

things/models.py

@@ -38,6 +38,7 @@ class Kind(models.TextChoices):
         LOGOUT = ("LOGOUT", "Logout")
         USAGE_MEMBER = ("USAGE_MEMBER", "Zeit (Member)")
         USAGE_NONMEMBER = ("USAGE_NONMEMBER", "Zeit (Nicht-Member)")
+        USAGE_METALAB = ("USAGE_METALAB", "Zeit (für Metalab)")
 
     thing = models.ForeignKey(Thing, on_delete=models.PROTECT)
     user = models.ForeignKey(