QA: Fix L1 cache regression & perform lifecycle maintenance

[shenald-dev]

• Fixed an issue where the L1 cache in heavyComputation was incorrectly returning false cache hits when undefined was passed as a parameter. The cache is now properly initialized with a unique Symbol rather than undefined.
• Verified fixing logic with tests/heavy_computation.test.js
• Cleaned up temp scripts and confirmed zero unused exports
• Synchronized .jules/warden.md ledger and appended release notes to CHANGELOG.md
• Prepared version 1.1.26 release tag

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PR created automatically by Jules for task 7325721988361983213 started by @shenald-dev

[google-labs-jules]

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[shenald-dev]

Consider adding a brief comment in src/index.js explaining why a unique Symbol is used for the undefined cache key to aid future maintainers.

Reviewed — quality: high

[shenald-dev]

Looks good, merging this in. CI is green and everything checks out 👍

Fix L1 cache regression by using a unique Symbol for undefined parameter and update release metadata.

[google-labs-jules]

Consider adding a brief comment in src/index.js explaining why a unique Symbol is used for the undefined cache key to aid future maintainers.

Reviewed — quality: high

Acknowledged. I have added a brief comment explaining why a unique Symbol is used for the L1 cache initialization to aid future maintainers.

[google-labs-jules]

Looks good, merging this in. CI is green and everything checks out 👍

Fix L1 cache regression by using a unique Symbol for undefined parameter and update release metadata.

Acknowledged.