[javier-aliaga]

Description

Fifth step of splitting DaprClientImpl into package-private classes, one per building block. This PR moves the binary file API (alpha).

• New package-private class DaprBinaryFileClient holds deleteBinaryFile, getBinaryFile, getBinaryFileBytes and both setBinaryFile overloads, plus validateBinaryFileArgs, splitBinaryFileChunk and the BINARY_FILE_CHUNK_SIZE constant. The bodies are unchanged.
• One line inside the moved code changes. The method reference DaprClientImpl::splitBinaryFileChunk now names DaprBinaryFileClient::splitBinaryFileChunk.
• The public methods on DaprClientImpl keep their signatures and Javadoc, and delegate in one line.
• No public API change. DaprClientImpl goes from 1,829 to 1,606 lines.

Issue reference

Part of #1875

Checklist

• Code compiles correctly
• Created/updated tests. DaprPreviewClientGrpcTest covers binary files through the public methods. The 626 sdk unit tests pass unchanged.
• Extended the documentation. Not needed, internal change.

[Copilot]

🟢 Approval recommended

The reviewed refactoring cleanly separates binary file operations into a package-private helper while preserving the existing public API and behavior, with no outstanding review concerns.

No open issues 🎉

What changed in this PR

This pull request extracts the alpha binary file operations from DaprClientImpl into a package-private DaprBinaryFileClient while preserving the existing public API and behavior.

Changes:

• Added DaprBinaryFileClient with binary file validation, upload, download, deletion, streaming, and chunking logic.
• Updated DaprClientImpl to initialize the helper and delegate its public binary file methods.
• Updated the binary upload chunking method reference to use the new helper class.

File	Description
sdk/​src/​main/​java/​io/​dapr/​client/​DaprClientImpl.java	Initializes the binary file client and delegates the public binary file methods while retaining their signatures and documentation.
sdk/​src/​main/​java/​io/​dapr/​client/​DaprBinaryFileClient.java	Provides the extracted package-private implementation for binary file operations, validation, and upload chunking.

_{Review effort: Lite}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.97%. Comparing base (9d51882) to head (1c019c9).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1907      +/-   ##
============================================
+ Coverage     81.96%   81.97%   +0.01%     
- Complexity     3663     3669       +6     
============================================
  Files           331      332       +1     
  Lines         11367    11376       +9     
  Branches       1290     1290              
============================================
+ Hits           9317     9326       +9     
  Misses         1556     1556              
  Partials        494      494              

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