AI-generated review — may contain errors.

Summary

Clean, mechanical update from clang-tidy 21.1.4 → 22.1.0. Three categories of changes:

1. Toolchain version bump: build_deps.jsonc, build_deps.MODULE.bazel (sha256 + URLs), compile_flags.txt (llvm-22 include paths)
2. .clang-tidy config adjustments: disable new noisy checks (-readability-redundant-parentheses), add modernize-use-string-view, move modernize-avoid-variadic-functions to TODO, note new bugprone-derived-method-shadowing-base-method for future enablement
3. Redundant typename removal across ~28 files: C++20 (P0634R3) made typename optional in contexts where only a type is valid (using declarations, default template args, trailing return types, friend declarations). All removals are correct for C++23.

Findings

No blocking issues. Two minor observations:

• [LOW] Pre-existing: bugprone-return-const-ref-from-parameter is both enabled (active checks) and listed in the TODO comment section — .clang-tidy:16 vs .clang-tidy:68. Not introduced by this PR; just noting for future cleanup.
• [INFO] modernize-avoid-variadic-functions demotion — moved from active checks to TODO. It might be worth a brief comment in the TODO section explaining why (new false positives in 22?) to help future readers understand the intent.