feat(preprocess): resume evidence jobs by run id

harness/tests/test_job_runner.py

@@ -64,6 +64,27 @@ def test_failed_stage_is_resumable_and_skips_completed_stage(tmp_path):
     assert calls == [("discover", False), ("acquire", False), ("recovered", False)]
 
 
+def test_resume_carries_successful_stage_artifacts_into_new_run(tmp_path):
+    def discover(context):
+        artifacts = context.run_dir / "artifacts"
+        artifacts.mkdir()
+        (artifacts / "discovery.json").write_text('{"source":"one"}')
+
+    first = run_job(
+        _spec(tmp_path, stage_ids=("discover", "acquire")),
+        [discover, lambda _context: (_ for _ in ()).throw(RuntimeError("crash"))],
+    )
+
+    def acquire(context):
+        assert (context.run_dir / "artifacts" / "discovery.json").read_text() == '{"source":"one"}'
+
+    resumed = run_job(
+        _spec(tmp_path, resume_run_id=first.run_id, stage_ids=("discover", "acquire")),
+        [discover, acquire],
+    )
+    assert resumed.status == "succeeded"
+
+
 def test_successful_job_is_idempotently_resumable(tmp_path):
     calls = []