fix(km): restore knowledge base readback

apps/api/src/services/knowledge_service.py

@@ -252,13 +252,18 @@ class KnowledgeService:
             result = await db.execute(
                 sa_text(
                     "SELECT id FROM knowledge_entries "
-                    "WHERE entry_type = 'anti_pattern' "
+                    "WHERE LOWER(CAST(entry_type AS TEXT)) = :entry_type "
                     "AND symptoms_hash = :hash "
                     "AND created_at >= :cutoff "
-                    "AND status != 'ARCHIVED' "
+                    "AND LOWER(CAST(status AS TEXT)) != :archived "
                     "ORDER BY created_at DESC LIMIT 5"
                 ),
-                {"hash": symptoms_hash, "cutoff": cutoff},
+                {
+                    "entry_type": EntryType.ANTI_PATTERN.value,
+                    "hash": symptoms_hash,
+                    "cutoff": cutoff,
+                    "archived": EntryStatus.ARCHIVED.value,
+                },
             )
             entry_ids = [row.id for row in result.fetchall()]