feat: add ov_dream OpenClaw skill for OpenViking sync

[heaoxiang-ai]

Description

Adds an ov_dream OpenClaw skill that syncs recent chat sessions into OpenViking without requiring the OpenViking contextEngine plugin slot. The skill supports OpenViking serverless authentication, periodic dream sync, and recall against the default user memory namespace.

Related Issue

N/A

Type of Change

• New feature
• Documentation update
• Test update

Changes Made

• Added examples/skills/ov_dream/SKILL.md with installation, sync, recall, and cron usage instructions.
• Added examples/skills/ov_dream/scripts/dream.py for:
  • OpenClaw session discovery from sessions.json
  • filtering non-chat sessions such as cron, heartbeat, subagent, ACP, and hook routes
  • independent sync cursors per session
  • OpenViking serverless request headers
  • session commit using the source OpenClaw session id
  • recall against viking://user/default
• Added tests for serverless auth, session filtering, sync cursors, recall defaults, and no raw jsonl fallback.

Testing

• python -m pytest examples/skills/ov_dream/tests/test_dream_cli.py
• Result: 10 passed

Checklist

• Code follows the existing project style.
• Tests were added for the new behavior.
• Documentation was added for installing and using the skill.
• Full repository test suite was run.

Additional Notes

This skill is intended for OpenClaw environments where installing the OpenViking contextEngine plugin is not possible or would consume a plugin slot.

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