Merge upstream Luau 0.691#9

Merged

HaroldCindy merged 10 commits intomainfrom

Nov 2, 2025

Commits on Aug 15, 2025

Sync to upstream/release/687 (#1954)

authored

Commits on Aug 21, 2025

Fix the fuzzer being built even if LUAU_BUILD_TESTS is off (#1830)
ffrostfall
authored

Commits on Aug 22, 2025

Sync to upstream/release/688 (#1968)
aatxe
authored

Commits on Aug 29, 2025

Sync to upstream/release/689 (#1981)

authored

Commits on Sep 5, 2025

Sync to upstream/release/690 (#1992)

authored
Allow files to return strings and enforce a single return value in the REPL's require implementation (#1967)
jackdotink
authored

Commits on Sep 15, 2025

Sync to upstream/release/691 (#1998)

authored

Commits on Nov 2, 2025