Fix AnalyzerOptions in DQDL rule converters

[sudsali]

Issue #, if available:

Description of changes:
This PR fixes how AnalyzerOptions are passed to Deequ Check methods in the DQDL rule converters, ensuring correct NULL handling when WHERE clauses are present.

Why was this necessary:
Without this fix, DQDL rule converters pass no AnalyzerOptions to Deequ Check methods, defaulting to NullBehavior.Ignore. This causes:

• WHERE clause rules to compute incorrect metrics (filtered NULLs silently ignored instead of treated as empty strings)
• ColumnLength to ignore NULLs instead of treating them as length 0
• ColumnValues EQUALS to ignore NULLs instead of failing the assertion
• Entropy to incorrectly filter rows when a WHERE clause is present (Entropy is a global metric)
• EMPTY/WHITESPACES_ONLY keywords to produce SQL without NULL guards, causing incorrect compliance ratios when NULLs are present

Changes:

• DQDLRuleConverter.scala: Add DEFAULT_ANALYZER_OPTION constant and analyzerOptionsForWhereClause() helper
• CompletenessRule, IsCompleteRule, UniquenessRule, IsUniqueRule, UniqueValueRatioRule: Pass AnalyzerOptions when WHERE clause present
• IsPrimaryKeyRule: Pass AnalyzerOptions + fix multi-column bug where completeness constraints were silently dropped
• ColumnLengthRule: Pass AnalyzerOptions unconditionally (NULLs treated as length 0)
• ColumnValuesRule: Pass AnalyzerOptions for WHERE clause; use NullBehavior.Fail for EQUALS min/max; add NULL guards for EMPTY and WHITESPACES_ONLY keywords in generated SQL
• EntropyRule: Remove WHERE clause filtering (global metric should not be filtered)
• ColumnValuesRuleSpec: Update 5 existing tests for new constraint representations
• AnalyzerOptionParitySpec (new): 11 integration tests covering all changes

All 1020 tests pass.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.