chore(main): release grayscale 0.5.4

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🤖 I have created a release beep boop

0.5.4 (2026-08-28)

Bug Fixes

• benchmarks: auto-reset fixtures and run workloads standalone (#2551) (004ad2c)
• ci: declare strptime on glibc for time.parse (6cbd174)
• codegen: bind map-value arrays to a temp for chained index and assign (#2550) (ed003bd)
• codegen: defer non-constant file-scope initializers to global init (#2545) (e31df3c)
• codegen: mask bit_not on u8 and u16 back to type width (#2553) (a73b10b)
• codegen: read cast(arr, [T]) results with the element width, not int64_t (#2555) (a2c59d9)
• codegen: read packed sized array elements at the real width in compound assign (0c93c5c)
• codegen: resolve module-level var name when passed to a by-reference parameter (#2546) (5a5751b)
• tests: fix stdlib time test (32dfb20)
• threads: detect pthread_create failure instead of corrupting state (#2554) (6822591)
• typechecker: reject cast() between a string-backed enum and an integer (#2536) (c467d11)
• typechecker: reject non-integer arguments to char() (#2552) (6839bb1)
• typechecker: resolve module-level var in member expr inside its own module (#2537) (2e16ffc)
• typechecker: resolve type aliases inside map, sized-array, and func signature positions (#2524) (838f52a)
• typechecker: warn when a variable is declared with no value (#2447) (f83e0a8)
• windows: fix bug in time.c (d276f61)

Performance Improvements

• benchmarks: add make benchmark real-workload suite (#2551) (ade370d)

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🤖 Created releases:

• grayscale-v0.5.4

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