fix: gracefully skip permission-denied errors during project scan

[utkarsh232005]

Problem

When running kdc from the home directory or any directory containing macOS-protected folders (like ~/Music, ~/Photos, etc.), the project scanner fails with:

Error: IO error for operation on /Users/.../Music/Music: Operation not permitted (os error 1)

This happens because:

1. kdc defaults to scanning the current directory (.) when no --project path is provided
2. The scanner uses WalkDir and propagates all errors via entry?
3. macOS sandboxing denies access to certain user folders, causing the scan to fail entirely

Fix

Change the scanner to skip entries that fail with permission errors instead of propagating the error and aborting the scan:

let entry = match entry {
    Ok(e) => e,
    Err(err) => {
        tracing::debug!("Skipping inaccessible path: {}", err);
        continue;
    }
};

This allows kdc to:

• Continue scanning accessible directories
• Log inaccessible paths at debug level for troubleshooting
• Work correctly when run from the home directory or other locations with protected subdirectories

Result

kdc now runs successfully from any directory, including ~, without failing on permission-denied errors.

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ℹ️ Review info

⚙️ Run configuration

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Run ID: e9ff2526-7755-40b4-a7ab-fc2b91228746

📥 Commits

Reviewing files that changed from the base of the PR and between d15fa59 and 2583105.

📒 Files selected for processing (1)

• src/project/scanner.rs

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[codescene-delta-analysis]

Gates Passed
3 Quality Gates Passed

See analysis details in CodeScene

Quality Gate Profile: The Bare Minimum
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[codecov]

Codecov Report

❌ Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/project/scanner.rs	50.00%	2 Missing ⚠️

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