refactor(cleanup): remove legacy CLI and complete EvoAgent migration cleanup

- Delete backend/cli.py and all CLI-specific tests (test_cli.py,
  test_openclaw_cli_service.py, test_skills_cli.py)
- Remove evotraders console script from pyproject.toml
- Update README/CLAUDE.md to reference python backend/main.py instead of CLI
- Add pytest-asyncio to dev dependencies
- Enhance EvoAgent with reload_runtime_assets and backward-compat attrs
- Align tests with updated API semantics and gateway process models

Constraint: CLI is deprecated in favor of split-service runtime model
Confidence: high
Scope-risk: moderate

backend/tests/test_evo_agent_selection.py

@@ -198,6 +198,7 @@ def test_evo_agent_reload_runtime_assets_refreshes_prompt_files(monkeypatch, tmp
         workspace_dir=workspace_dir,
         model=DummyModel(),
         formatter=DummyFormatter(),
+        prompt_files=["SOUL.md"],
         skills_manager=type(
             "SkillsManagerStub",
             (),
@@ -248,11 +249,15 @@ def test_pipeline_create_runtime_analyst_uses_evo_agent_when_enabled(monkeypatch
     created = {}
 
     class DummyEvoAgent:
+        name = "test_analyst"
+
         def __init__(self, **kwargs):
             created.update(kwargs)
             self.toolkit = None
 
     class DummyAnalystAgent:
+        name = "test_analyst"
+
         def __init__(self, **kwargs):
             created.update(kwargs)
             self.toolkit = None
@@ -308,11 +313,15 @@ def test_pipeline_create_runtime_analyst_uses_legacy_when_not_in_evo_ids(monkeyp
     created = {}
 
     class DummyEvoAgent:
+        name = "test_analyst"
+
         def __init__(self, **kwargs):
             created.update(kwargs)
             self.toolkit = None
 
     class DummyAnalystAgent:
+        name = "test_analyst"
+
         def __init__(self, **kwargs):
             created.update(kwargs)
             self.toolkit = None