fix(hermes): advertise memory tools before gateway init

[RerankerGuo]

Description | 描述

Advertise the Hermes memory_tencentdb search tool schemas before Gateway initialization so Hermes can build its tool routing table correctly in zero-config auto-discovery mode.

Runtime tool calls still go through the existing Gateway availability checks and return a transient unavailable error while the sidecar is starting or disconnected.

Related Issue | 关联 Issue

Fix #219

Change Type | 修改类型

• Bug fix | Bug 修复
• New feature | 新功能
• Documentation update | 文档更新
• Code optimization | 代码优化

Self-test Checklist | 自测清单

• Verified locally | 本地验证通过
• No existing features affected | 无影响现有功能

Additional Notes | 其他说明

Verified with:

• npm test
• npm run build
• Python smoke test for pre-initialize get_tool_schemas() with no Gateway env vars

python3 -m pytest hermes-plugin/memory/memory_tencentdb/tests/test_memory_tencentdb_recovery.py could not be run in this environment because pytest is not installed.

[Maxwell-Code07]

Thanks for the PR! We'll review the tool registration fix.