Fix version display, deterministic sort, remove duplicate sort

get_version() now returns version.name instead of str(version), which
returned the numeric ID from redminelib.resources.Version. Falls back
to str() when .name is absent (#14).

Add issue.id as tertiary sort key in build_grouped_report so tasks
within the same project+version group always appear in the same order
regardless of API response ordering (#33).

Remove redundant sort from client.fetch_issues_with_spent_time — the
sort already runs in report_builder.build_grouped_report, so doing it
twice wastes CPU. Also remove the now-unused get_version import (#32).

Closes #14, closes #32, closes #33

tests/test_report_builder.py

@@ -105,3 +105,15 @@ def test_build_grouped_report_preserves_issue_id_and_subject():
     rows = build_grouped_report(issues)
     assert rows[0]["issue_id"] == 42
     assert rows[0]["subject"] == "Моя задача"
+
+
+def test_build_grouped_report_deterministic_order_within_group():
+    """Задачи в одной группе проект+версия упорядочены по issue.id
+    независимо от порядка на входе (#33)."""
+    issues = [
+        (MockIssue("P", "Task C", "New", "v1.0", 103), 1.0),
+        (MockIssue("P", "Task A", "New", "v1.0", 101), 1.0),
+        (MockIssue("P", "Task B", "New", "v1.0", 102), 1.0),
+    ]
+    rows = build_grouped_report(issues)
+    assert [r["issue_id"] for r in rows] == [101, 102, 103]