⚡ Bolt: Use .with_context for lazy error formatting

[ffalcinelli]

💡 What: Replaced .context(format!(...)) with .with_context(|| format!(...)) in src/apply/authenticator_config.rs.
🎯 Why: Using .context eagerly evaluates the format! macro, causing unnecessary heap allocations (String creation) every time the code executes, even when there is no error. Using .with_context defers this allocation entirely to the error path, making the successful path faster and allocation-free.
📊 Impact: Reduced heap allocations during the successful execution of authenticator config applications. While a micro-optimization, it adheres to zero-cost abstraction principles.
🔬 Measurement: Verify by running cargo clippy -- -D warnings and the full test suite (cargo test), ensuring the clippy::perf checks (specifically format_in_result) pass cleanly without performance warnings.

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PR created automatically by Jules for task 4418104639200125887 started by @ffalcinelli

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[codecov]

Codecov Report

❌ Patch coverage is 66.66667% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 95.82%. Comparing base (56e7192) to head (170df4e).

Files with missing lines	Patch %	Lines
src/apply/authenticator_config.rs	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #161      +/-   ##
==========================================
- Coverage   95.86%   95.82%   -0.05%     
==========================================
  Files          28       28              
  Lines        2345     2346       +1     
==========================================
  Hits         2248     2248              
- Misses         97       98       +1     

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