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Xuanwo
a2a0d7f632
`build-no-lock` restores Rust build outputs twice: toolchain setup enables its own cache by default before Cargo.lock removal, then the workflow restores an explicit cache afterward. Both restore into the same Cargo and target paths; the implicit action also allows PR cache saves. Disable only toolchain setup's implicit cache. The explicit restore remains after lock removal and retains its main-only save condition. This configuration is inherited unchanged by #4996. Its [failed job](https://github.com/lancedb/lancedb/actions/runs/43229196192/job/131220088196) reported runner ENOSPC while the second cache action was active, before dependency installation or Cargo. Earlier hosted logs confirm two restores into overlapping paths, but the failed job's full logs are unavailable, so the exact disk peak and ENOSPC cause remain unproven. A bounded probe using the resolved composite-action definitions verifies two restores before this change versus one afterward, preserves ordering and main-only saves, and confirms all other workflow configuration is unchanged. The [hosted run](https://github.com/lancedb/lancedb/actions/runs/43230840086/job/131225407007) confirms one successful 1.62 GB cache restore after lock removal and no PR cache save. It reached Cargo and linking without ENOSPC, but hit the inherited 30-minute deadline with the unchanged one-job driver. Free disk was 85 GiB before the build and 79 GiB at cancellation; these endpoint observations do not establish peak disk use or a general ENOSPC guarantee. The complementary two-job repair in #4996 now includes this prerequisite for combined hosted acceptance; this PR remains limited to cache ownership.