fix(agent): persist no-write learning receipts

apps/api/tests/test_knowledge_repository_read_model.py

@@ -12,6 +12,7 @@ from src.repositories.knowledge_repository import (
     _ASSET_TAXONOMY_KEYS,
     KnowledgeDBRepository,
     _enum_text,
+    _knowledge_enum_db_label,
 )
 
 
@@ -263,3 +264,12 @@ def test_enum_text_helper_casts_status_to_lowercase_text() -> None:
 
     assert "lower(cast(knowledge_entries.status as varchar))" in compiled
     assert "archived" in compiled
+
+
+def test_knowledge_enum_db_labels_match_deployed_postgresql_contract() -> None:
+    assert _knowledge_enum_db_label(EntryType.INCIDENT_CASE) == "INCIDENT_CASE"
+    assert _knowledge_enum_db_label(EntryType.ANTI_PATTERN) == "ANTI_PATTERN"
+    assert _knowledge_enum_db_label(EntrySource.AI_EXTRACTED) == "AI_EXTRACTED"
+    assert _knowledge_enum_db_label(EntrySource.HUMAN) == "HUMAN"
+    assert _knowledge_enum_db_label(EntryStatus.DRAFT) == "DRAFT"
+    assert _knowledge_enum_db_label(EntryStatus.PUBLISHED) == "published"