Dev boxed variant

[jpschorr]

Issue #, if available:

Description of changes:

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

[github-actions]

Conformance comparison report

	Base (db26def)	3f614f4	+/-
% Passing	86.97%	87.15%	0.19%
✅ Passing	5591	5603	12
❌ Failing	838	826	-12
🔶 Ignored	0	0	0
Total Tests	6429	6429	0

Number passing in both: 5591

Number failing in both: 826

Number passing in Base (db26def) but now fail: 0

Number failing in Base (db26def) but now pass: 12

The following test(s) were previously failing but now pass. Before merging, confirm they are intended to pass:

Click here to see

• partiql_tests::eval::ion::primitives::primitives::functions::exists::exists::strict_exists_valid_cases_param_missing_result_true_
• partiql_tests::eval::ion::primitives::primitives::functions::exists::exists::permissive_exists_valid_cases_param_result_false_
• partiql_tests::eval::ion::primitives::primitives::functions::exists::exists::permissive_exists_valid_cases_param_missing_result_true_
• partiql_tests::eval::ion::primitives::primitives::functions::exists::exists::permissive_exists_valid_cases_param_1_result_true_
• partiql_tests::eval::ion::primitives::primitives::functions::exists::exists::strict_exists_valid_cases_param_result_false_
• partiql_tests::eval::ion::query::query::select::projection::project_various_container_types::strict_project_of_sexp
• partiql_tests::eval::ion::primitives::primitives::functions::exists::exists::strict_exists_valid_cases_param_null_result_true_
• partiql_tests::eval::ion::query::query::select::from_clause::various_types_in_from_clause::strict_range_over_sexp
• partiql_tests::eval::ion::query::query::select::projection::project_various_container_types::permissive_project_of_sexp
• partiql_tests::eval::ion::primitives::primitives::functions::exists::exists::permissive_exists_valid_cases_param_null_result_true_
• partiql_tests::eval::ion::query::query::select::from_clause::various_types_in_from_clause::permissive_range_over_sexp
• partiql_tests::eval::ion::primitives::primitives::functions::exists::exists::strict_exists_valid_cases_param_1_result_true_

[codecov]

Codecov Report

Attention: Patch coverage is 58.70902% with 403 lines in your changes missing coverage. Please review.

Project coverage is 80.12%. Comparing base (375abaa) to head (babeb5f).

Files with missing lines	Patch %	Lines
extension/partiql-extension-ion/src/boxed_ion.rs	55.72%	194 Missing and 11 partials ⚠️
extension/partiql-extension-ion/src/decode.rs	56.43%	36 Missing and 8 partials ⚠️
partiql-value/src/variant.rs	66.95%	37 Missing and 1 partial ⚠️
partiql-value/src/datum.rs	22.85%	27 Missing ⚠️
partiql-value/src/value.rs	48.88%	21 Missing and 2 partials ⚠️
partiql-value/src/boxed_variant.rs	41.66%	21 Missing ⚠️
partiql-eval/src/plan.rs	72.91%	8 Missing and 5 partials ⚠️
extension/partiql-extension-ion/src/util.rs	88.00%	5 Missing and 4 partials ⚠️
partiql-eval/src/eval/expr/mod.rs	0.00%	6 Missing ⚠️
partiql-eval/src/eval/eval_expr_wrapper.rs	50.00%	5 Missing ⚠️
... and 6 more

Additional details and impacted files

@@                       Coverage Diff                       @@
##           feat-paramaterized-equality     #536      +/-   ##
===============================================================
- Coverage                        81.18%   80.12%   -1.06%     
===============================================================
  Files                               90       95       +5     
  Lines                            19730    20607     +877     
  Branches                         19730    20607     +877     
===============================================================
+ Hits                             16017    16511     +494     
- Misses                            3293     3651     +358     
- Partials                           420      445      +25     

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