v2026.2.1

Fixed

• Fragment API 429 responses are now retried automatically (up to 3 attempts) with exponential backoff and jitter in fragment_request
• Retry delays in TON transaction broadcasting now include jitter to reduce contention under concurrent calls
• Improved handling of non-200 HTTP responses in get_fragment_hash
• Removed unnecessary method key leaking into certain API request payloads

Changed

• Type hints refined across the codebase for better clarity and mypy strict compliance

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