Promote AA0471, AA0472 and AA0474 to Error in the base ruleset

[Jesper Schulz-Wedde (JesperSchulz)]

Continues the ruleset hardening for AB#640773 by promoting three analyzer rules from None back to Error in src/rulesets/base.ruleset.json.

Stacked on #10133.

What changed

Rule	Distinct violations	How it is handled
AA0472	0	Override removed
AA0471	1	Fixed in code, override removed
AA0474	5	Fixed in code, override removed

All six violations are in the Withholding Tax app, and all are genuine omissions rather than exceptions worth accepting, so they are fixed rather than suppressed.

AutoFormatType = 1 means the value is an amount, and the analyzer requires a matching AutoFormatExpression naming the currency. In Withholding Tax Entry and WHT Empl. Ledger Entry Ext the neighbouring amount fields already specify AutoFormatExpression = Rec."Currency Code", and the fields flagged here had simply been missed, so they now do the same. WHT Threshold Accumulator has no currency field at all because it only ever accumulates local currency amounts, so it uses an empty expression, which is the standard way to express LCY.

Fixing the table field also resolved the AA0471 report on Withholding Tax Entries, since the page control inherits its formatting from the underlying field.

Corrected scope

The first revision of this PR also promoted AA0473 and AS0112, on the strength of local measurements that found 4 and 3 violations respectively. CI disagreed, and CI was right: 886 AA0473 and 630 AS0112 diagnostics across the 44 Build Apps jobs.

The local scan had simply not reached far enough. It had covered 398 of 878 projects when it was stopped, and the dependency-ordered pass before it could not build large parts of src/Apps at all, so entire areas — Master Data Mgt., BC14 Historical Data, remittance advice and others — were never examined. A rule looked clean because nothing had looked at the code that violates it.

Both rules therefore keep their overrides and need real remediation in their own PRs.

How the surviving numbers were established

From the failed CI run itself, which compiles everything. Tallying ##[error] diagnostics across all 44 Build Apps jobs gives AA0471 36 and AA0474 180 occurrences, but those are the same handful of W1 sites recompiled once per country: 1 and 5 distinct sites. AA0472 does not appear in any job.

The six sites were then reproduced locally against the updated ruleset to get exact line numbers, and the Withholding Tax app now compiles clean (exit 0) with CodeCop, AppSourceCop, PerTenantExtensionCop and UICop enabled.

Related to AB#640773