feat: reuse Sender/Receiver reduce memory allocation

[ArgoZhang]

Link issues

fixes #27

Summary By Copilot

Regression?

• Yes
• No

Risk

• High
• Medium
• Low

Verification

• Manual (required)
• Automated

Packaging changes reviewed?

• Yes
• No
• N/A

☑️ Self Check before Merge

⚠️ Please check all items below before review. ⚠️

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• Merge the latest code from the main branch

[Copilot]

Pull Request Overview

This PR optimizes memory allocation by reusing Sender and Receiver instances instead of creating new ones for each operation. The change eliminates the overhead of repeatedly allocating and disposing these objects during socket communications.

• Replaced per-operation instantiation with reusable instance fields
• Added proper disposal of reused instances in the cleanup method
• Modified null-checking logic to accommodate the new reuse pattern

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