Refactor moderation actions to include channel and source metadata

- Updated moderation action functions to include `channelId` and `source` in the metadata for better tracking of actions.
- Introduced an `auditFrom` function to streamline the addition of audit information across various commands.
- Removed `prisma/migrations` from .gitignore to ensure migration files are tracked.
- Enhanced the `CreateCaseInput` type to accommodate new metadata structure.

packages/shared/src/audit.test.ts

@@ -0,0 +1,24 @@
+import { describe, expect, it } from 'vitest';
+import { buildCaseMetadata } from './audit.js';
+
+describe('buildCaseMetadata', () => {
+  it('builds standardized purge metadata', () => {
+    const metadata = buildCaseMetadata({
+      source: 'button_confirmation',
+      channelId: '123',
+      extras: {
+        confirmed: true,
+        purge: {
+          requestedAmount: 10,
+          deletedCount: 8,
+          filters: { botsOnly: true }
+        }
+      }
+    });
+
+    expect(metadata.source).toBe('button_confirmation');
+    expect(metadata.channelId).toBe('123');
+    expect(metadata.purge?.deletedCount).toBe(8);
+    expect(metadata.recordedAt).toBeTypeOf('string');
+  });
+});