rafapolo b5d84e3556 feat: add LLM SQL query assistant and dataset sampler ...

- ask.py: Python script to query Base dos Dados via natural language using Gemini,
  generates and executes DuckDB SQL from Portuguese questions
- ask/ (Rust): CLI companion for the SQL query assistant with system prompt
- sample_datasets.py: samples parquet files from S3 into a local DuckDB for exploration
- sample_datasets/ (Rust): CLI for dataset sampling
- context/: LLM context bundle (schemas, join keys, file tree) for query generation

2026-03-28 11:23:51 +01:00

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