v2026.9.1

=== Breaking changes ===
7f8147218 Add diagnostics for conflicting enum scope declarations (#11048)

=== All changes for this release ===
4685b35be ci: remove vestigial LLVM cache workflows (#11199)
c9b62be4f Fix CMark wasm release package path (#11198)
[BREAKING] 7f8147218 Add diagnostics for conflicting enum scope declarations (#11048)
493fa8493 Language reference: enumeration declarations (#11044)
b45a09a58 docs: add Lambda Expressions section to the user guide (#11131)
2482ac7fb Package CMark in wasm release libs (#11190)
0dcaeb0f5 ci: add apt.llvm.org repo for versioned clang install (#11189)
22be091d4 Update SPIRV-Tools and SPIRV-Headers to latest versions (#11188)
772097002 Warn when the same variable is passed to aliased out/inout parameters (#11151)
4ce7d9430 Print constructor names as 'TypeName.init' in diagnostics instead of '$init' (#11155)
2c84428b7 Emit visibility-mismatch note when synthesized ctor argument count fails (#11149)
3c7377276 ci: install clang-18 toolchain in LLVM cache workflows (#11186)