Multi Source Data Correlation

via “multi-table join and correlation analysis”

** - Provides AI assistants with a secure and structured way to explore and analyze data in [GreptimeDB](https://github.com/GreptimeTeam/greptimedb).

Unique: Provides semantic join operations that understand time-series alignment requirements, automatically handling timestamp matching and window boundaries rather than exposing raw SQL JOIN syntax to LLMs

vs others: Reduces join complexity for LLMs compared to raw SQL because it abstracts time-window alignment and prevents common temporal join errors like mismatched granularities