Suppport cluster redis

[weilixu]

No description provided.

[Copilot]

Pull request overview

Adds Redis Cluster support for LangGraph checkpointers by introducing a cluster-aware saver that uses per-thread hash tags to keep multi-key lifecycle operations within a single Redis Cluster hash slot.

Changes:

• Introduces RedisClusterSaver and wires it into AgentFactory via checkpointer.type: redis_cluster.
• Extends CheckpointerConfig and YAML agent spec handling/tests to accept and pass through redis_cluster options.
• Updates docs and templates to describe the new backend and clarify the trust boundary for dotted-path tools in headless YAML specs.

Reviewed changes

Copilot reviewed 12 out of 12 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
tests/test_yaml_agent_tool.py	Adds coverage for long-text stream truncation behavior (currently needs assertion fix).
tests/test_yaml_agent_spec.py	Verifies YAML spec passes through redis_cluster checkpointer config.
tests/test_redis_cluster_checkpointer.py	Validates Redis Cluster hash-tagged key layout for thread-scoped keys.
tests/test_checkpointer_config.py	Extends normalization/validation tests to include redis_cluster and ensures _build_checkpointer uses the cluster saver.
README.md	Documents redis_cluster backend and selection guidance (one wording mismatch with actual error messages).
docs/yaml_agent_spec.md	Documents redis_cluster config and adds warning about trusted dotted-path tools in headless specs.
docs/tools.md	Adds warning about treating headless YAML specs/dotted tools as trusted configuration.
docs/templates/headless_subagent.yaml	Adds template guidance about dotted-path tool trust.
automa_ai/config/checkpointer.py	Adds redis_cluster to supported types and validation rules.
automa_ai/checkpoint/redis_cluster.py	Implements RedisClusterSaver with per-thread hash tags for cluster-safe key grouping.
automa_ai/checkpoint/init.py	Exports RedisClusterSaver.
automa_ai/agents/agent_factory.py	Adds redis_cluster construction path in _build_checkpointer.

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[Copilot]

Pull request overview

Copilot reviewed 12 out of 12 changed files in this pull request and generated no new comments.