feat: [script] Fix how non-verb words are imported, as they were missing

a wordform entry for the "default" lemma (i.e. masculine, singular form)

api/scripts/import_dictionary.py

@@ -278,6 +278,20 @@ def _parse_entry(record: dict, lang_code: str) -> dict | None:
             }
         )
 
+    # Verbs have a dedicated kaikki entry for each conjugated form (including
+    # the infinitive itself), so the headword is already covered.  For all other
+    # POS (nouns, adjectives, …) no such entry exists, so we add the headword
+    # form explicitly here.
+    if pos_raw != "verb":
+        wordforms.append(
+            {
+                "id": _wordform_uuid(lemma_id, word, []),
+                "lemma_id": lemma_id,
+                "form": word,
+                "tags": [],
+            }
+        )
+
     return {
         "lemma": {
             "id": lemma_id,