feat(host-agent): make execution history authoritative

tests/test_host_agent_task_storage.py

@@ -2,6 +2,7 @@
 
 from __future__ import annotations
 
+import sqlite3
 from datetime import UTC, datetime, timedelta
 from pathlib import Path
 
@@ -75,6 +76,57 @@ def test_step_transitions_persist_during_execution(tmp_path) -> None:
     assert [r["index"] for r in records] == [1, 2]
 
 
+def test_task_metadata_creation_is_idempotent_and_keeps_source_correlation(
+    tmp_path,
+) -> None:
+    metadata_store = TaskMetadataStore(tmp_path / "tasks.sqlite3")
+    task = _make_task("task-source")
+
+    metadata_store.create_task(
+        task,
+        source_task_id="cloud-task-source",
+        source_attempt=2,
+    )
+    metadata_store.create_task(task)
+
+    row = metadata_store.get_task(task.id)
+    assert row is not None
+    assert row["source_task_id"] == "cloud-task-source"
+    assert row["source_attempt"] == 2
+
+
+def test_existing_task_database_gains_source_correlation_columns(tmp_path) -> None:
+    db_path = tmp_path / "legacy.sqlite3"
+    with sqlite3.connect(db_path) as connection:
+        connection.execute(
+            """
+            create table tasks (
+                id text primary key,
+                goal text not null,
+                device_id text not null,
+                status text not null,
+                created_at text not null,
+                updated_at text not null,
+                completed_at text,
+                failure_reason text
+            )
+            """
+        )
+
+    metadata_store = TaskMetadataStore(db_path)
+    task = _make_task("task-migrated")
+    metadata_store.create_task(
+        task,
+        source_task_id="cloud-task-migrated",
+        source_attempt=1,
+    )
+
+    row = metadata_store.get_task(task.id)
+    assert row is not None
+    assert row["source_task_id"] == "cloud-task-migrated"
+    assert row["source_attempt"] == 1
+
+
 # --------------------------------------------------------------------------- #
 # Queryable after completion (in-memory Task discarded)
 # --------------------------------------------------------------------------- #