Add activity log amount formatting metadata

[Prangshuman Das (t-prda)]

Summary

Add currency-aware display metadata to the Expense Activity Log Entry amount snapshots.

• LCY fields use local-currency formatting.
• Native reimbursable and refundable fields use the stored reimbursement currency.
• API decimal values and activity snapshot behavior are unchanged.

Issue

Fixes AB#647062

Validation

• Diff validation passed.
• Compile the Expense Agent app.
• Verify amount formatting for LCY and reimbursement-currency scenarios.

[Prangshuman Das (t-prda)]

Agentic PR Review - Round 1

Recommendation: Accept

What this PR does

This PR adds currency-aware display metadata to the amount snapshots in Expense Activity Log Entry. The LCY fields use local-currency formatting, while reimbursable and refundable amounts use the stored Reimbursement Currency Code.

The metadata matches the established Expense Report Header and posted-document patterns. It changes only how decimal values are displayed; stored snapshot values, API decimal values, calculations, and control flow remain unchanged.

Suggestions

No suggestions.

Risk assessment and necessity

Risk: Low. The change is limited to ExpenseActivityLogEntry.Table.al and adds declarative formatting metadata only. It does not change table fields, public APIs, events, calculations, or persisted values.

Necessity: The change is needed so activity-log amounts show the same currency context as the source expense report. The scope is narrow and follows existing Expense Agent formatting patterns.

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