fix(): project refactoring and minor fixes

src/backend/apps/flags/migrations/0003_alter_featureflag_key.py

@@ -0,0 +1,19 @@
+# Generated by Django 5.2.11 on 2026-02-24 04:52
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('flags', '0002_alter_featureflag_key'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='featureflag',
+            name='key',
+            field=models.CharField(help_text='Unique identifier for the feature flag', max_length=100, unique=True, validators=[django.core.validators.RegexValidator(message='Flag key must follow snake_case, camelCase, or PascalCase.', regex='^[A-Za-z][A-Za-z0-9_]*$')], verbose_name='key'),
+        ),
+    ]

src/backend/apps/flags/models.py

@@ -62,7 +62,7 @@ class FeatureFlag(BaseModel):
             RegexValidator(
                 regex=FLAG_KEY_PATTERN,
                 message=(
-                    "Event type name must follow snake_case, "
+                    "Flag key must follow snake_case, "
                     "camelCase, or PascalCase."
                 ),
             )