add django backend in /core

ported from laravel in c3lf/lfbackend repo

core/inventory/migrations/0001_initial.py

@@ -0,0 +1,54 @@
+# Generated by Django 4.2.7 on 2023-11-18 11:28
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Container',
+            fields=[
+                ('cid', models.AutoField(primary_key=True, serialize=False)),
+                ('name', models.CharField(max_length=255)),
+                ('created_at', models.DateTimeField(blank=True, null=True)),
+                ('updated_at', models.DateTimeField(blank=True, null=True)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Event',
+            fields=[
+                ('eid', models.AutoField(primary_key=True, serialize=False)),
+                ('name', models.CharField(max_length=255)),
+                ('slug', models.CharField(max_length=255, unique=True)),
+                ('start', models.DateTimeField(blank=True, null=True)),
+                ('end', models.DateTimeField(blank=True, null=True)),
+                ('pre_start', models.DateTimeField(blank=True, null=True)),
+                ('post_end', models.DateTimeField(blank=True, null=True)),
+                ('created_at', models.DateTimeField(blank=True, null=True)),
+                ('updated_at', models.DateTimeField(blank=True, null=True)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Item',
+            fields=[
+                ('iid', models.AutoField(primary_key=True, serialize=False)),
+                ('uid', models.IntegerField()),
+                ('description', models.TextField()),
+                ('returned_at', models.DateTimeField(blank=True, null=True)),
+                ('created_at', models.DateTimeField(blank=True, null=True)),
+                ('updated_at', models.DateTimeField(blank=True, null=True)),
+                ('container', models.ForeignKey(db_column='cid', on_delete=django.db.models.deletion.CASCADE, to='inventory.container')),
+                ('event', models.ForeignKey(db_column='eid', on_delete=django.db.models.deletion.CASCADE, to='inventory.event')),
+            ],
+            options={
+                'unique_together': {('uid', 'event')},
+            },
+        ),
+    ]