Consolidate documentation and update backend services

- Reorganize docs into 'Core deployment guides' and 'Setup and configuration' subdirectories
- Consolidate redundant documentation files (ACR, pipelines, deployment guides)
- Add documentation consolidation plan
- Update backend database factory and logger services
- Update migration script and docker-compose configurations
- Add PostgreSQL setup script

backend/scripts/migrate-sqlite-to-postgres.ts

@@ -17,6 +17,8 @@ const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
 
 const SQLITE_CACHE_DB = join(__dirname, '../../data/cmdb-cache.db');
+// Note: Legacy support - old SQLite setups may have had separate classifications.db file
+// Current setup uses a single database file for all data
 const SQLITE_CLASSIFICATIONS_DB = join(__dirname, '../../data/classifications.db');
 
 async function migrate() {