v0.2.0

feat: enhanced summary prompt with few-shot template

Replace minimal prompt with full Python-equivalent prompt structure:
- Add system instruction (adaptive knowledge synthesis engine persona)
- Add few-shot example (example input + expected output)
- Add structured user prompt template matching Python get_prompt()
- Route Gemma models to prepend system instruction to user prompt
- All prompt assets compiled into binary via include_str!

Release v0.2.0