FINERACT-2585: Standardize String Locale usage in Command Infrastructure and Build Services

[hms2186]

Description

This PR standardizes locale-dependent string case conversions across core command processing and build services. By replacing default .toUpperCase() calls with .toUpperCase(Locale.ROOT), we ensure consistent behavior across different deployment environments and prevent functional failures in locales with unique casing rules (e.g., the "Turkish I" issue).

Checklist

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[hms2186]

Could a maintainer please re-run the E2E Shard 9 check? This appears to be a pre-existing flaky test unrelated to my changes — all other 42 checks are passing and the branch merges cleanly.

[hms2186]

Could a maintainer please approve the CI workflows? Squashed to 1 commit as per contribution guidelines. All previous checks were passing (42/43), with only a flaky E2E Shard 9 failure unrelated to my changes.

[hms2186]

42/43 checks passing with no conflicts. The single E2E failure (Shard 15) is a pre-existing flaky test on WorkingCapitalDelinquencyConfiguration and LoanReAmortization features, unrelated to locale normalization changes. This pattern is consistent across all CI runs on this PR