Add parse_array primitive and document CSV array workflows

[matthewhorridge]

Summary

• add new parse_array primitive with json (default) and delimiter formats
• support delimiter parsing with pipe (|) and newline (\n)
• align parse_array boolean coercion with normalize_boolean behavior
• wire parse_array into primitive vocabulary/imports and harmonization rule deserialization
• update demo rules to use parse_array before reduce for week_hours
• document parse_array and parse_array -> reduce usage in README

Tests

• venv/bin/pytest -q tests/test_primitives_serialization.py tests/test_rule_serialization.py

Related

• Implements Add parse_array primitive for rule-level array deserialization #97

[matthewhorridge]

Addressed failing CI test in .\n\nRoot cause: reports missing-source errors via (), which raises . The test was incorrectly expecting .\n\nFix pushed in commit :\n- now asserts with exit code .\n\nValidation:\n- ....................................................................... [100%]
71 passed in 0.46s -> .

[matthewhorridge]

Addressed the failing CI test in tests/test_cli.py.

Root cause:

• cli.main reports missing-source errors via argparse (parser.error), which raises SystemExit(2).
• The test was incorrectly expecting ValueError.

Fix pushed in commit ed0dd28:

• test_cli_missing_behavior now asserts SystemExit with exit code 2.

Validation:

• venv/bin/pytest -q -> 71 passed.