feat: add Hermes Agent MemOS integration

[dnegxuantian]

Description

本 PR 为 Hermes Agent 增加 MemOS 集成，覆盖三条能力链路：

• Hermes 接入 MemOS 的方法：提供 setup.sh 一键配置脚本、Hermes 用户插件示例和集成文档。
• Hermes 既有记忆全量迁移到 MemOS：提供 migrate_hermes_memory.py，读取 ~/.hermes/memories/MEMORY.md 和 USER.md，按内容分类迁移到 text_mem / pref_mem。
• Hermes 新对话增量同步到 MemOS，并交给 Scheduler 沉淀：提供 hermes_log_syncer.py，读取 ~/.hermes/logs/agent.log 识别完整 turn，结合 ~/.hermes/state.db 补全内容，先写入 RawConversationTurn，再批量提交给 MemOS Scheduler / MemReader。

Implementation notes

• 原始对话轮次以 status="archived" 存储为源材料，正常检索不会直接召回原始聊天记录。
• 批处理复用现有 MEM_READ 调度路径，由 MemOS 负责提取、合并、压缩和组织。
• 同步器支持本地或远程 MCP 端点，可通过 --mcp-url、MEMOS_MCP_URL 或 ~/.hermes/memos-log-syncer.json 配置。

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Refactor (does not change functionality, e.g. code style improvements, linting)
• Documentation update

How Has This Been Tested?

• Unit Test
• Test Script Or Tests Steps (please provide)
• Pipeline Automated API Test (please provide)

本地运行 pytest 覆盖 4 个测试文件共 33 个用例，全部通过（33 passed, 1 warning）：

• tests/api/test_mcp_serve.py
• tests/examples/test_hermes_log_syncer.py
• tests/examples/test_hermes_memos_plugin.py
• tests/examples/test_migrate_hermes_memory.py

PYTHONPATH=src:. .venv/bin/pytest \
  tests/examples/test_hermes_log_syncer.py \
  tests/examples/test_hermes_memos_plugin.py \
  tests/examples/test_migrate_hermes_memory.py \
  tests/api/test_mcp_serve.py \
  -q

代码风格通过 ruff format + ruff check。

Checklist

• I have performed a self-review of my own code | 我已自行检查了自己的代码
• I have commented my code in hard-to-understand areas | 我已在难以理解的地方对代码进行了注释
• I have added tests that prove my fix is effective or that my feature works | 我已添加测试以证明我的修复有效或功能正常

[Memtensor-AI]

Automated Test Results: PASSED

Cloud test-engine rerun against dev-v2.0.22 completed successfully after migrating this run from the old 10010 queue to the updated cloud test-engine.

• Run: tr-4ab344eb-bef on cloud test-engine 10012
• Scope: memos_python_core/changed-repo-python
• Result: 22 passed, 0 failed, 11 skipped

Manual code review is still required before merge.