IEEE 1800-2023 SVA Upgrade

This release upgrades the SVA formal verification pipeline from IEEE 1800-2017 to IEEE 1800-2023 compliance across 4 sprints (22-25), adding 95 new tests with full backwards compatibility.

New Expression Variants

Three new SvaExpr variants for 2023-specific constructs: ArrayMap for IEEE 7.12 array .map() methods with iterator and index arguments, TypeThis for IEEE 6.23 type(this) parameterization, and RealConst for IEEE 5.7.2 real literal constants in assertion expressions.

Real-Valued Checker Variables

RandVarType enum replaces the old width: u32 field on RandVar, supporting both BitVec(u32) and Real discriminants. This enables rand real and rand const real checker variables as specified in IEEE 17.7 (2023). BoundedSort::Real and VerifyType::Real thread the Z3 Real sort through the entire verification pipeline.

Triple-Quoted Strings & New System Tasks

IEEE 5.9 triple-quoted string support ("""...""") in assertion action blocks, with proper escape sequence handling and string-aware else keyword parsing. Three new system tasks recognized: $timeunit, $timeprecision (IEEE 20.4.1), and $stacktrace (IEEE 20.17).

Hardware Parser Gap Fixes

Fixes for shall modal gate, always/never after copula, after/when subordinators, and-conjunction in conditionals, bit as noun, request/grant disambiguation, counting quantifiers, and HAB SVA synthesis patterns.

CI Pipeline Optimization

Benchmark result commits now use [skip ci] to prevent cascading workflow re-triggers, reducing total workflow executions from 12 to 7 per release.