fix: stop packaging tarball inside dist

[behrangsa]

Summary

• package release archives outside the dist/ staging directory to avoid tar re-reading its own output
• move the archive and checksum back into dist/ after creation while preserving Windows/macOS branching

Testing

• cargo fmt --check
• cargo clippy --all-targets --all-features
• cargo test -- --test-threads=1
• simulated packaging script locally (Linux target) with new logic; tar now succeeds

[Copilot]

Pull Request Overview

This PR fixes a packaging issue where tar was attempting to read its own output by creating archives outside the dist/ directory and then moving them back in. The change prevents tar from recursively processing its own output file during archive creation.

• Moves archive creation outside the dist/ directory to avoid tar self-reference
• Unifies archive naming logic with a common ARCHIVE_BASENAME variable
• Preserves platform-specific branching for Windows/macOS while consolidating the workflow

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[Copilot]

The checksum files are created with relative paths ../ in their content, which will show incorrect paths when the files are moved to the dist/ directory. The checksum should contain just the archive filename without the relative path prefix.

[Copilot]

The checksum files are created with relative paths ../ in their content, which will show incorrect paths when the files are moved to the dist/ directory. The checksum should contain just the archive filename without the relative path prefix.

[github-actions]

📊 Coverage Report

Metric	Covered	Total	Rate
Lines	131	146	89.73%
Branches	0	0	N/A

Additional Metric	Value
Complexity	0
Files Reported	1
Report Timestamp	2025-09-24T22:06:34.000Z

View detailed report

src/main.rs: 89.7%

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