fix(km): read back mixed enum labels safely

apps/api/src/repositories/knowledge_repository.py

@@ -337,15 +337,18 @@ class KnowledgeDBRepository:
             )
             result = await self.db.execute(stmt)
             entry_id: str = result.scalar_one()
-            # UPSERT 後用 id 重新 SELECT，確保取到完整的 ORM 物件
+            # Read through the enum-safe projection because production keeps
+            # both legacy uppercase labels and the lowercase published label.
             fetch_result = await self.db.execute(
-                select(KnowledgeEntryRecord).where(KnowledgeEntryRecord.id == entry_id)
+                select(*_knowledge_entry_columns()).where(
+                    KnowledgeEntryRecord.id == entry_id
+                )
             )
-            record = fetch_result.scalar_one()
+            record = fetch_result.mappings().one()
             logger.info(
                 "knowledge_entry_upserted",
-                entry_id=record.id,
-                title=record.title,
+                entry_id=record["id"],
+                title=record["title"],
                 path_type=data.path_type,
                 incident_id=data.related_incident_id,
             )
@@ -372,9 +375,19 @@ class KnowledgeDBRepository:
         )
         self.db.add(record)
         await self.db.flush()
-        await self.db.refresh(record)
-        logger.info("knowledge_entry_created", entry_id=record.id, title=record.title)
-        return self._to_model(record)
+        entry_id = str(record.id)
+        fetch_result = await self.db.execute(
+            select(*_knowledge_entry_columns()).where(
+                KnowledgeEntryRecord.id == entry_id
+            )
+        )
+        readback = fetch_result.mappings().one()
+        logger.info(
+            "knowledge_entry_created",
+            entry_id=readback["id"],
+            title=readback["title"],
+        )
+        return self._to_model(readback)
 
     async def get_by_id(self, entry_id: str) -> KnowledgeEntry | None:
         """根據 ID 取得知識條目（排除 archived）"""