Optimize resource usage

[SilianZ]

Summary

• stream downloads to disk to avoid large memory usage
• generate measure files incrementally
• allow storage backends to accept generic binary streams
• prune logs in MemoryDataBase
• lower dashboard monitoring overhead
• address review comments

Testing

• python -m py_compile $(git ls-files '*.py')
• pytest -q

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https://chatgpt.com/codex/tasks/task_e_6880ab2599f0832b932213ef03537ec5