Add SQLite database files to gitignore

- Remove dev.db and dev/dev.db from git tracking
- Update .gitignore to exclude SQLite development databases
- Prevent local database files from being committed

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -4,4 +4,6 @@ node_modules/
 payload-docs
 dist/
 /dev/payload.db
+/dev/dev.db
+dev.db
 tsconfig.tsbuildinfo