fix: [30388f42] Optimiere SQLite Config für Synology/Docker (Fix ROLLBACKs)

- Setzt PRAGMA synchronous=NORMAL und PRAGMA mmap_size=0.
- Deaktiviert Memory Mapping, da dies auf Docker-Volumes (Synology) oft zu I/O-Fehlern und fehlgeschlagenen Commits führt.
- Soll die mysteriösen ROLLBACKs im Company Explorer beheben.

company-explorer/backend/database.py

@@ -10,11 +10,13 @@ engine = create_engine(
     connect_args={"check_same_thread": False, "timeout": 30}
 )
 
-# Enable WAL mode for SQLite
+# Enable WAL mode for SQLite with Docker/Synology optimizations
 @event.listens_for(engine, "connect")
 def set_sqlite_pragma(dbapi_connection, connection_record):
     cursor = dbapi_connection.cursor()
     cursor.execute("PRAGMA journal_mode=WAL")
+    cursor.execute("PRAGMA synchronous=NORMAL") # Less aggressive syncing, better for concurrent access
+    cursor.execute("PRAGMA mmap_size=0") # Disable mmap to fix potential Docker volume I/O errors
     cursor.close()
 
 SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)