feat(logging): add stats extraction for all tools

tests/unit/test_logging.py

@@ -1,6 +1,6 @@
 """Unit tests for logging module."""
 
-from grist_mcp.logging import truncate_token
+from grist_mcp.logging import truncate_token, extract_stats
 
 
 class TestTruncateToken:
@@ -22,3 +22,52 @@ class TestTruncateToken:
     def test_boundary_token_shows_prefix_suffix(self):
         token = "abcdefghi"  # 9 chars - first to show truncation
         assert truncate_token(token) == "abc...ghi"
+
+
+class TestExtractStats:
+    def test_list_documents(self):
+        result = {"documents": [{"name": "a"}, {"name": "b"}, {"name": "c"}]}
+        assert extract_stats("list_documents", {}, result) == "3 docs"
+
+    def test_list_tables(self):
+        result = {"tables": ["Orders", "Products"]}
+        assert extract_stats("list_tables", {}, result) == "2 tables"
+
+    def test_describe_table(self):
+        result = {"columns": [{"id": "A"}, {"id": "B"}]}
+        assert extract_stats("describe_table", {}, result) == "2 columns"
+
+    def test_get_records(self):
+        result = {"records": [{"id": 1}, {"id": 2}]}
+        assert extract_stats("get_records", {}, result) == "2 records"
+
+    def test_sql_query(self):
+        result = {"records": [{"a": 1}, {"a": 2}, {"a": 3}]}
+        assert extract_stats("sql_query", {}, result) == "3 rows"
+
+    def test_add_records_from_args(self):
+        args = {"records": [{"a": 1}, {"a": 2}]}
+        assert extract_stats("add_records", args, {"ids": [1, 2]}) == "2 records"
+
+    def test_update_records_from_args(self):
+        args = {"records": [{"id": 1, "fields": {}}, {"id": 2, "fields": {}}]}
+        assert extract_stats("update_records", args, {}) == "2 records"
+
+    def test_delete_records_from_args(self):
+        args = {"record_ids": [1, 2, 3]}
+        assert extract_stats("delete_records", args, {}) == "3 records"
+
+    def test_create_table(self):
+        args = {"columns": [{"id": "A"}, {"id": "B"}]}
+        assert extract_stats("create_table", args, {}) == "2 columns"
+
+    def test_single_column_ops(self):
+        assert extract_stats("add_column", {}, {}) == "1 column"
+        assert extract_stats("modify_column", {}, {}) == "1 column"
+        assert extract_stats("delete_column", {}, {}) == "1 column"
+
+    def test_empty_result_returns_zero(self):
+        assert extract_stats("list_documents", {}, {"documents": []}) == "0 docs"
+
+    def test_unknown_tool(self):
+        assert extract_stats("unknown_tool", {}, {}) == "-"