feat: harden runtime readiness and session workflow

harness/tests/test_solved_search_cli.py

@@ -11,6 +11,7 @@ import json
 from typer.testing import CliRunner
 
 from tht.cli import app
+from tht.ports.vector import VectorReadUnavailable
 from tht.vectorstore.rest_client import VectorRestError
 from tht.vectorstore.store import VectorHit
 
@@ -39,6 +40,19 @@ def test_solved_search_degrades_when_vectordb_unreachable(tmp_path, monkeypatch)
     assert "exemplar non disponibili" in res.stderr
 
 
+def test_solved_search_degrades_direct_vector_read_error(tmp_path, monkeypatch):
+    def boom(cfg):
+        raise VectorReadUnavailable("Vector read operation unavailable")
+
+    monkeypatch.setattr("tht.cli.vector_cmd.open_searcher", boom)
+    res = CliRunner().invoke(
+        app, ["memory", "solved-search", "quante ablazioni", "--json", "-c", str(_cfg(tmp_path))]
+    )
+    assert res.exit_code == 0, res.output
+    assert json.loads(res.stdout) == []
+    assert "exemplar non disponibili" in res.stderr
+
+
 def test_solved_search_degrades_human_mode(tmp_path, monkeypatch):
     def boom(cfg):
         raise VectorRestError("Vector REST non raggiungibile")