feat(qemu): support SATA CD-ROM interfaces

- Add per-drive IDE/SATA selection with backward-compatible IDE defaults
- Persist interfaces in nodes, templates, and appliance imports
- Add database migration support for versioned and unversioned databases
- Prevent partial updates when rejecting live interface changes
- Validate interfaces and support SATA media changes through the monitor

gns3server/db/models/templates.py

@@ -202,6 +202,8 @@ class QemuTemplate(Template):
     hdd_disk_interface = Column(String)
     cdrom_image = Column(String)
     cdrom2_image = Column(String)
+    cdrom_interface = Column(String, nullable=False, default="ide", server_default="ide")
+    cdrom2_interface = Column(String, nullable=False, default="ide", server_default="ide")
     initrd = Column(String)
     kernel_image = Column(String)
     bios_image = Column(String)