Fix required tag updates for policy tag lists

[Tony-MK]

Motivation

• Fix failures when toggling the policy requiresTag flag that occurred due to attempting to spread or merge undefined tag list entries when building updated policy tag data.

Description

• Changed getUpdatedTagsData in src/libs/actions/Policy/Tag.ts to iterate over policyData.tags ?? {} and guard against missing tag lists by skipping undefined entries and merging from the actual tagList instead of spreading possibly-undefined accumulator entries.

Testing

• Attempted to run npm test -- --runTestsByPath tests/actions/PolicyTagTest.ts, but jest was not available in the environment so automated tests could not be executed.

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Codex Task