Add memory guidance for Code Context query usage

[15290391025]

We hit a practical footgun while using the CodeGraph MCP Code Context query.

A vague natural-language query like:

Find async execution, message queue, Spring Cloud Stream event publishers and consumers

can drift toward unrelated symbols such as streamChat / stream, because the query does not give CodeGraph enough concrete code anchors.

Could the installer add a very short memory note for the AI about how to write Code Context queries?

Suggested memory text:

When using CodeGraph Code Context, include concrete symbols, class names, method names, annotations, or framework keywords in the query. Avoid vague natural-language-only queries. Example: EventPublisher Consumer DomainEvent StreamBridge @Async AiTaskExecutorService AsyncConfig.

This would help agents use the MCP more reliably right after install.