feat: replace php migration with django migration

- keep latest legacy version in initial migration file
- move propel schema to api legacy app
- remove legacy upgrade tool

api/libretime_api/legacy/migrations/0007_2_5_9.py

@@ -0,0 +1,33 @@
+from django.db import migrations
+
+from ._migrations import legacy_migration_factory
+
+UP = """
+CREATE TABLE cloud_file
+(
+    id serial NOT NULL,
+    resource_id text NOT NULL,
+    storage_backend text NOT NULL,
+    cc_file_id integer NOT NULL,
+    CONSTRAINT cloud_file_pkey PRIMARY KEY (id),
+    CONSTRAINT "cloud_file_FK_1" FOREIGN KEY (cc_file_id)
+        REFERENCES cc_files (id) MATCH SIMPLE
+        ON UPDATE NO ACTION ON DELETE CASCADE
+)
+"""
+
+DOWN = None
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("legacy", "0006_2_5_5"),
+    ]
+    operations = [
+        migrations.RunPython(
+            code=legacy_migration_factory(
+                target="2.5.9",
+                sql=UP,
+            )
+        )
+    ]