transfer_manager 0.3.0

A protocol-aware, crash-safe transfer engine for Dart and Flutter.

0.3.0

• Implemented atomic managed-source staging for persistent uploads.
• Added safe managed-file cleanup after completion or cancellation.
• Retained managed sources after failures so tasks remain retryable.
• Added restart recovery for staged upload sources.

0.2.0

• Added TUS 1.0 resumable uploads.
• Persisted upload session URLs and acknowledged offsets.
• Added server-offset reconciliation across retries and restored tasks.
• Added chunk-level progress, auth refresh, and integrity verification for TUS.

0.1.0

• Initial foreground transfer engine.
• Added persistent scheduling, HTTP range downloads, multipart uploads, authentication refresh, checksum verification, progress, retry, and tests.