890: column should consist of delimited codelists

[alexfurmenkov]

This PR adds support for #890.

Suggested rule:

Check:
  all:
    - name: $spec_codelist
      operator: not_contains_all
      value: $ppspec_value
Core:
  Id: CDISC.SENDIG.SEND282
  Status: Draft
  Version: "1"
Operations:
  - codelists:
      - SPEC
    level: term
    id: $spec_codelist
    operator: codelist_terms
    returntype: value
  - name: PPSPEC
    delimiter: ;
    id: $ppspec_value
    operator: split_by
Description: If multiple specimen types are used for a calculation (e.g., serum
  and urine for creatinine clearance), then this field should be populated with
  values from the (SPEC) Controlled Terminology codelist delimited by a
  semicolon.
Executability: Fully Executable
Outcome:
  Message: The multiple specimens are not correctly separated by a semicolon
  Output Variables:
    - $ppspec_value
    - $spec_codelist

core.py command:

validate
-s
send
-v
1-0
-l
info
-dp
unit-test-coreid-SENDIG282.json
-lr
Rule.yml
-ct
sendct-2025-09-26

The idea is:

1. Pull SPEC codelist values from the provided CT package (codelist_terms operation)
2. Split the target column (PPSPEC in this case) by the desired delimiter (split_by operation)
3. For every row, check that the result of step 1 contains all items from step 2. The Check section should be interpreted as "Find all rows where $spec_codelist doesn't contain all of $ppspec_value"