v0.64.3

Changelog

• 56a1c29 Bump version to v0.64.3
• a9aa723 Merge pull request #782 from tiendungdev/fix/issue-777-admission-diagnostics
• 8173733 Merge pull request #788 from pbednarcik/fix/checkout-admission-off-gate
• f669ea7 fix(indexer): address checkout admission review feedback
• 7447f3a fix(indexer): identify checkout mutation admission contention
• 87b31a4 fix(indexer): queue checkout mutation admission
• eecec55 indexer: admit checkout source edits without the shared build lane
• fe54632 test(mcp): require exact automatic worktree views