fix: address django migration failing on SQLite (#5308)

## Which issue(s) this PR closes

Fixes https://github.com/grafana/oncall/issues/5306 (and related to
https://github.com/grafana/oncall/issues/5244#issuecomment-2503999986) +
add CI check to avoid this from happening in the future

## Checklist

- [x] Unit, integration, and e2e (if applicable) tests updated
- [x] Documentation added (or `pr:no public docs` PR label added if not
required)
- [x] Added the relevant release notes label (see labels prefixed w/
`release:`). These labels dictate how your PR will
    show up in the autogenerated release notes.

.github/workflows/linting-and-tests.yml

@@ -190,9 +190,15 @@ jobs:
         uses: actions/checkout@v4
       - name: Setup Python
         uses: ./.github/actions/setup-python
+      - name: Wait for MySQL to be ready
+        working-directory: engine
+        run: ./wait_for_test_mysql_start.sh
+      - name: Test Django migrations work from blank slate
+        working-directory: engine
+        run: python manage.py migrate
       - name: Unit Test Backend
         working-directory: engine
-        run: ./wait_for_test_mysql_start.sh && pytest -x
+        run: pytest -x
 
   unit-test-backend-postgresql-rabbitmq:
     name: "Backend Tests: PostgreSQL + RabbitMQ (RBAC enabled: ${{ matrix.rbac_enabled }})"
@@ -229,6 +235,9 @@ jobs:
         uses: actions/checkout@v4
       - name: Setup Python
         uses: ./.github/actions/setup-python
+      - name: Test Django migrations work from blank slate
+        working-directory: engine
+        run: python manage.py migrate
       - name: Unit Test Backend
         working-directory: engine
         run: pytest -x
@@ -259,6 +268,9 @@ jobs:
         uses: actions/checkout@v4
       - name: Setup Python
         uses: ./.github/actions/setup-python
+      - name: Test Django migrations work from blank slate
+        working-directory: engine
+        run: python manage.py migrate
       - name: Unit Test Backend
         working-directory: engine
         run: pytest -x

engine/apps/alerts/migrations/0070_remove_resolutionnoteslackmessage__slack_channel_id_db.py

@@ -1,7 +1,7 @@
 # Generated by Django 4.2.16 on 2024-11-20 20:23
 
-import common.migrations.remove_field
-import django_migration_linter as linter
+# import common.migrations.remove_field
+# import django_migration_linter as linter
 from django.db import migrations
 
 
@@ -12,10 +12,14 @@ class Migration(migrations.Migration):
     ]
 
     operations = [
-        linter.IgnoreMigration(),
-        common.migrations.remove_field.RemoveFieldDB(
-            model_name='resolutionnoteslackmessage',
-            name='_slack_channel_id',
-            remove_state_migration=('alerts', '0068_remove_resolutionnoteslackmessage__slack_channel_id_state'),
-        ),
+        # NOTE: commented out due to some issues this was causing w/ SQLite:
+        # https://github.com/grafana/oncall/issues/5306
+        # https://github.com/grafana/oncall/issues/5244#issuecomment-2503999986
+        #
+        # linter.IgnoreMigration(),
+        # common.migrations.remove_field.RemoveFieldDB(
+        #     model_name='resolutionnoteslackmessage',
+        #     name='_slack_channel_id',
+        #     remove_state_migration=('alerts', '0068_remove_resolutionnoteslackmessage__slack_channel_id_state'),
+        # ),
     ]