feat: add pollTransaction method to SorobanServer to poll transaction status with retry strategy.

[overcat]

No description provided.

[Copilot]

Pull Request Overview

This PR adds the pollTransaction method to the SorobanServer to implement a retry strategy when polling for a transaction status. Key changes include:

• Added two overloads of pollTransaction in SorobanServer.java.
• Integrated a new SleepStrategy functional interface.
• Introduced unit tests in SorobanServerTest.java and updated resource files to simulate NOT_FOUND responses.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
src/main/java/org/stellar/sdk/SorobanServer.java	Added pollTransaction methods with retry logic and SleepStrategy interface.
src/test/java/org/stellar/sdk/SorobanServerTest.java	Added unit tests for pollTransaction using a simulated dispatcher.
src/test/resources/soroban_server/get_transaction_not_found.json	New response file for the NOT_FOUND transaction scenario.
CHANGELOG.md	Updated changelog to include the pollTransaction feature.

Comments suppressed due to low confidence (1)

src/test/java/org/stellar/sdk/SorobanServerTest.java:518

• Consider adding tests for the failure scenario when the polling exceeds the maximum attempts (always returning NOT_FOUND) and tests verifying that an IllegalArgumentException is thrown if maxAttempts is less than or equal to 0.

  public void testPollTransaction() throws IOException, SorobanRpcException, InterruptedException {

[codecov]

Codecov Report

Attention: Patch coverage is 71.42857% with 4 lines in your changes missing coverage. Please review.

Project coverage is 80.21%. Comparing base (dc2b705) to head (9751f33).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
src/main/java/org/stellar/sdk/SorobanServer.java	71.42%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master     #696      +/-   ##
============================================
- Coverage     80.23%   80.21%   -0.03%     
- Complexity     1228     1232       +4     
============================================
  Files           213      213              
  Lines          4853     4867      +14     
  Branches        413      415       +2     
============================================
+ Hits           3894     3904      +10     
- Misses          705      707       +2     
- Partials        254      256       +2     

Files with missing lines	Coverage Δ
src/main/java/org/stellar/sdk/SorobanServer.java	84.03% <71.42%> (-0.89%)	⬇️

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