feat(compression): add summary_base_url + move compression config to YAML-only

- Add summary_base_url config option to compression block for custom
  OpenAI-compatible endpoints (e.g. zai, DeepSeek, Ollama)
- Remove compression env var bridges from cli.py and gateway/run.py
  (CONTEXT_COMPRESSION_* env vars no longer set from config)
- Switch run_agent.py to read compression config directly from
  config.yaml instead of env vars
- Fix backwards-compat block in _resolve_task_provider_model to also
  fire when auxiliary.compression.provider is 'auto' (DEFAULT_CONFIG
  sets this, which was silently preventing the compression section's
  summary_* keys from being read)
- Add test for summary_base_url config-to-client flow
- Update docs to show compression as config.yaml-only

Closes #1591
Based on PR #1702 by @uzaylisak

tests/tools/test_docker_environment.py

@@ -216,6 +216,34 @@ def test_auto_mount_replaces_persistent_workspace_bind(monkeypatch, tmp_path):
     assert "/sandboxes/docker/test-persistent-auto-mount/workspace:/workspace" not in run_args_str
 
 
+def test_non_persistent_cleanup_removes_container(monkeypatch):
+    """When container_persistent=false, cleanup() must run docker rm -f so the container is removed (Fixes #1679)."""
+    run_calls = []
+
+    def _run(cmd, **kwargs):
+        run_calls.append((list(cmd) if isinstance(cmd, list) else cmd, kwargs))
+        if cmd and getattr(cmd[0], "__str__", None) and "docker" in str(cmd[0]):
+            if len(cmd) >= 2 and cmd[1] == "run":
+                return subprocess.CompletedProcess(cmd, 0, stdout="abc123container\n", stderr="")
+        return subprocess.CompletedProcess(cmd, 0, stdout="", stderr="")
+
+    monkeypatch.setattr(docker_env, "find_docker", lambda: "/usr/bin/docker")
+    monkeypatch.setattr(docker_env.subprocess, "run", _run)
+    monkeypatch.setattr(docker_env.subprocess, "Popen", lambda *a, **k: type("P", (), {"poll": lambda: None, "wait": lambda **kw: None, "returncode": 0, "stdout": iter([]), "stdin": None})())
+
+    captured_run_args = []
+    _install_fake_minisweagent(monkeypatch, captured_run_args)
+
+    env = _make_dummy_env(persistent_filesystem=False, task_id="ephemeral-task")
+    assert env._container_id
+    container_id = env._container_id
+
+    env.cleanup()
+
+    rm_calls = [c for c in run_calls if isinstance(c[0], list) and len(c[0]) >= 4 and c[0][1:4] == ["rm", "-f", container_id]]
+    assert len(rm_calls) >= 1, "cleanup() should run docker rm -f <container_id> when container_persistent=false"
+
+
 class _FakePopen:
     def __init__(self, cmd, **kwargs):
         self.cmd = cmd