Unified database facade for LaminarDB.

Provides a single entry point (LaminarDB) that ties together the SQL parser, query planner, DataFusion context, and streaming API.

Example

use laminar_db::LaminarDB;

let db = LaminarDB::open()?;

db.execute("CREATE SOURCE trades (
    symbol VARCHAR, price DOUBLE, ts BIGINT,
    WATERMARK FOR ts AS ts - INTERVAL '1' SECOND
)").await?;

let query = db.execute("SELECT symbol, AVG(price)
    FROM trades GROUP BY symbol, TUMBLE(ts, INTERVAL '1' MINUTE)
").await?;