feat(mcp): tool search_organisations (résolution nom -> id)

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

tests/mcp/test_queries.py

@@ -1,4 +1,7 @@
+import pytest
+
 import src.utils.search as search_mod
+from src.mcp.queries import search_organisations
 from src.utils.data import DF_ACHETEURS
 from src.utils.search import search_org
 
@@ -19,3 +22,20 @@ def test_search_org_track_true_calls_track_search(monkeypatch):
     search_org(DF_ACHETEURS, "ACHETEUR", "acheteur", track=True)
 
     assert calls == [("ACHETEUR", "home_page_search")]
+
+
+def test_search_organisations_finds_known_acheteur():
+    result = search_organisations("ACHETEUR", "acheteur")
+    assert any(r["id"] == "123" for r in result)
+    first = next(r for r in result if r["id"] == "123")
+    assert set(first.keys()) == {"id", "nom", "departement"}
+
+
+def test_search_organisations_invalid_type_raises():
+    with pytest.raises(ValueError):
+        search_organisations("x", "autre")
+
+
+def test_search_organisations_respects_limite():
+    result = search_organisations("ACHETEUR", "acheteur", limite=1)
+    assert len(result) <= 1