recon + sqlglot validator + drill_down package; guard ReAct dimension picks against candidate list

tests/test_analyses_registry.py

@@ -0,0 +1,23 @@
+"""Regression: Analysis registry exposes the expected Analyses."""
+
+from api.analyses.registry import REGISTRY, catalog, get
+
+
+def test_registry_has_expected_analyses():
+    assert set(REGISTRY) >= {"direct_answer", "compare_periods", "drill_down"}
+
+
+def test_registry_get_returns_instance_or_none():
+    a = get("direct_answer")
+    assert a is not None
+    assert a.name == "direct_answer"
+    assert get("does_not_exist") is None
+
+
+def test_catalog_shape_for_planner():
+    cat = catalog()
+    names = {entry["name"] for entry in cat}
+    assert names >= {"direct_answer", "compare_periods", "drill_down"}
+    for entry in cat:
+        assert isinstance(entry["description"], str) and entry["description"]
+        assert isinstance(entry["args_schema"], dict)