Test Runner Modernization

7 sections

100%
Section 1 walking-skeleton Section 2 runner-json-output Section 3 test-all-json-consumption Section 4 build-caching Section 5 cargo-nextest Section 6 incremental-and-llvm-parallelism Section 7 metrics-ledger
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Completed

7 sections
Section 1 Complete

walking-skeleton

1/1 tasks
Section 2 Complete

runner-json-output

2/2 tasks
Section 3 Complete

test-all-json-consumption

3/3 tasks
Section 4 Complete

build-caching

2/2 tasks
Section 5 Complete

cargo-nextest

1/1 tasks
Section 6 Complete

incremental-and-llvm-parallelism

2/2 tasks
Section 7 Complete

metrics-ledger

3/3 tasks