🗺️ Atlas: Extract GithubIssueError to github_issue module

[madmax983]

🕸️ Tangle: The GithubIssueError type is defined in the top-level error.rs file, which is a structural leak. The error type belongs with the specific GitHub issue handling logic.
📐 Blueprint: Moved the GithubIssueError enum from src/error.rs to its domain module src/run/github_issue.rs and updated the top-level Error enum to reference the new location.
🧱 Stability: Improved module cohesion by keeping domain-specific error types close to the logic that generates them, reducing the bloat of the central error.rs file.
🔬 Verification: Verified via cargo check, cargo test, and cargo clippy that the extraction compiles cleanly and causes no regressions.

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PR created automatically by Jules for task 5475375121508458195 started by @madmax983

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.19%. Comparing base (9aa2ad9) to head (cbfdada).

Files with missing lines	Patch %	Lines
src/exit_code.rs	0.00%	4 Missing ⚠️

❌ Your patch check has failed because the patch coverage (0.00%) is below the target coverage (60.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##            trunk     #600      +/-   ##
==========================================
- Coverage   85.19%   85.19%   -0.01%     
==========================================
  Files         114      114              
  Lines       65408    65408              
==========================================
- Hits        55725    55723       -2     
- Misses       9683     9685       +2     

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[gemini-code-assist]

Code Review

This pull request refactors the codebase by moving the GithubIssueError enum from src/error.rs to src/run/github_issue.rs and updating its references. The review feedback correctly notes that defining production code and imports below the tests module is non-idiomatic in Rust, and recommends moving the enum definition above the test module and placing the import at the top of the file.

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[gemini-code-assist]

In Rust, the tests module (typically marked with #[cfg(test)]) should be the last block in the file. Defining production code, such as the GithubIssueError enum and its imports, after the tests module is non-idiomatic and makes the code harder to maintain and navigate.

To improve maintainability and adhere to standard Rust conventions, please move the GithubIssueError definition and the use thiserror::Error; import above the mod tests block, and place the import at the top of the file with the other imports.