feat: rename remote peer to parent

[gaius-qi]

Description

This pull request primarily involves renaming various functions, structs, and comments to replace references to "remote peer" with "parent" in the dragonfly-client project. The changes span multiple files and affect error handling, documentation, and function names to ensure consistency with the new terminology.

Renaming for Consistency:

• dragonfly-client-core/src/error/errors.rs: Renamed DownloadFromRemotePeerFailed struct to DownloadFromParentFailed and updated associated error messages.
• dragonfly-client-core/src/error/mod.rs: Updated references to DownloadFromRemotePeerFailed to DownloadFromParentFailed in error definitions and usage. [1] [2]
• dragonfly-client-storage/src/lib.rs: Renamed function download_piece_from_remote_peer_finished to download_piece_from_parent_finished.
• dragonfly-client/src/grpc/dfdaemon_upload.rs: Updated function names and comments to replace "remote peer" with "parent" in DfdaemonUpload and DfdaemonUploadClient implementations. [1] [2] [3] [4]
• dragonfly-client/src/resource/persistent_cache_task.rs: Updated function names and comments to replace "remote peer" with "parent" in PersistentCacheTask implementation. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12]
• dragonfly-client/src/resource/piece.rs: Renamed function download_from_remote_peer to download_from_parent and updated comments accordingly. [1] [2]
• dragonfly-client/src/resource/piece_collector.rs: Updated comments and function names to replace "remote peer" with "parent" in PieceCollector implementation. [1] [2] [3]
• dragonfly-client/src/resource/task.rs: Updated function names and comments to replace "remote peer" with "parent" in Task implementation. [1] [2] [3] [4]

Related Issue

Motivation and Context

Screenshots (if appropriate)

[chlins]

lgtm

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 13 lines in your changes missing coverage. Please review.

Project coverage is 33.80%. Comparing base (d6b613e) to head (3db2413).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...onfly-client/src/resource/persistent_cache_task.rs	0.00%	6 Missing ⚠️
dragonfly-client/src/resource/task.rs	0.00%	6 Missing ⚠️
dragonfly-client/src/resource/piece_collector.rs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #901   +/-   ##
=======================================
  Coverage   33.80%   33.80%           
=======================================
  Files          60       60           
  Lines        9034     9034           
=======================================
  Hits         3054     3054           
  Misses       5980     5980           

Files with missing lines	Coverage Δ
dragonfly-client-core/src/error/errors.rs	89.90% <ø> (ø)
dragonfly-client-core/src/error/mod.rs	59.09% <ø> (ø)
dragonfly-client-storage/src/lib.rs	2.00% <ø> (ø)
dragonfly-client/src/grpc/dfdaemon_upload.rs	0.00% <ø> (ø)
dragonfly-client/src/resource/piece.rs	63.33% <ø> (ø)
dragonfly-client/src/resource/piece_collector.rs	0.00% <0.00%> (ø)
...onfly-client/src/resource/persistent_cache_task.rs	0.00% <0.00%> (ø)
dragonfly-client/src/resource/task.rs	0.00% <0.00%> (ø)