Treat only processed invoices as already sorted

Prompts used since the previous commit:

- User said they do not want final destination folders in Archief.
- User clarified: only treat INBOX.Facturen - verwerkt as already sorted; treat all other mailboxes as sources except Sent, Drafts, Trash and Spam.

Special observations:

- Updated source-folder selection accordingly.
- Removed Archief final destination creation and added Technisch destination folders.
- Verified Python compilation and route/folder consistency.

maak_mappen.py

@@ -185,11 +185,9 @@ def mappen() -> list[str]:
         "Bestellingen.Sligro",
         "Bestellingen.Smartphonehoesjes",
         "Bestellingen.Viking",
-        # Archief nieuwe jaren
-        "Archief.2023",
-        "Archief.2024",
-        "Archief.2025",
-        "Archief.2026",
+        # Technisch
+        "Technisch",
+        "Technisch.DMARC",
     ]
     return folders