Add a shared helper for lookup field case normalization

[labkey-martyp]

Rationale

Eleven trigger scripts across the EHR compliance and ONPRC modules had each copied the same loop for case-normalizing lookup values on write, so this adds the single shared implementation they can call instead. The helper takes the LookupValidationHelper as an argument rather than constructing one, because that class caches each lookup target's allowable values per instance: callers keep creating it at script scope, where the target table is read once per batch instead of once per row.

Related Pull Requests

• Normalize compliance lookups on write and consolidate the duplicated loop ehrModules#1199 — converts the EHR compliance scripts to this helper.
• Use the shared LDK helper for lookup normalization onprcEHRModules#1885 — converts the ONPRC scripts.

This must merge and deploy first. A consumer script that requires the new function against an un-updated LDK fails at script compile time.

Changes

• Adds LDK.Server.Utils.normalizeLookupFields, which replaces each named field's value with the canonically-cased value from its lookup target and reports a field error for any value the target does not contain.
• Documents why the validation helper is a parameter, since creating one per call would silently turn a per-batch read of each lookup target into a per-row read.

Tasks

• Claude Code Review
• Code Review