Implement skill self-evolution and skill_manage flow (#1874)

* chore: ignore .worktrees directory

* Add skill_manage self-evolution flow

* Fix CI regressions for skill_manage

* Address PR review feedback for skill evolution

* fix(skill-evolution): preserve history on delete

* fix(skill-evolution): tighten scanner fallbacks

* docs: add skill_manage e2e evidence screenshot

* fix(skill-manage): avoid blocking fs ops in session runtime

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Co-authored-by: Willem Jiang <willem.jiang@gmail.com>

backend/packages/harness/deerflow/config/__init__.py

@@ -2,6 +2,7 @@ from .app_config import get_app_config
 from .extensions_config import ExtensionsConfig, get_extensions_config
 from .memory_config import MemoryConfig, get_memory_config
 from .paths import Paths, get_paths
+from .skill_evolution_config import SkillEvolutionConfig
 from .skills_config import SkillsConfig
 from .tracing_config import (
     get_enabled_tracing_providers,
@@ -13,6 +14,7 @@ from .tracing_config import (
 
 __all__ = [
     "get_app_config",
+    "SkillEvolutionConfig",
     "Paths",
     "get_paths",
     "SkillsConfig",