golden questions: 30, corpus: FastAPI docs

case                              hit@1  hit@5    MRR | pytest gate
baseline                          0.367  0.933  0.583 | exit=0 3 passed in 0.21s
chunk_size 800->200               0.500  0.800  0.628 | exit=1 1 failed, 2 passed in 0.31s
      AssertionError: hit@5 0.800 < baseline 0.933 - 0.05; 6 questions missed top-5, e.g. ['How do I run code after sending the response to the client?', 'How do I accept a persistent two-way connec
chunk_size 800->3000              0.367  0.900  0.601 | exit=0 3 passed in 0.20s
heading_prefix off                0.300  0.867  0.513 | exit=1 3 failed in 0.22s
      AssertionError: hit@1 0.300 < baseline 0.367 - 0.05; 4 questions missed top-5, e.g. ['How do I return a custom error message and status code when something goes wrong?', 'How do I read a value
      AssertionError: hit@5 0.867 < baseline 0.933 - 0.05; 4 questions missed top-5, e.g. ['How do I return a custom error message and status code when something goes wrong?', 'How do I read a value
      AssertionError: mrr 0.513 < baseline 0.583 - 0.05; 4 questions missed top-5, e.g. ['How do I return a custom error message and status code when something goes wrong?', 'How do I read a value s
lowercase off (tokenizer bug)     0.400  0.733  0.553 | exit=1 1 failed, 2 passed in 0.23s
      AssertionError: hit@5 0.733 < baseline 0.933 - 0.05; 8 questions missed top-5, e.g. ['How do I change the HTTP status code an endpoint returns without raising an exception?', 'How do I set a c