[tpn]

Summary

cargo oxide emit-ltoir could compile successfully and then read the wrong .ll file when a directory differed from its Cargo target name or the command ran from a workspace member. Resolve the standalone target from Cargo metadata and use the same intermediate directory for compilation and reading.

Changes

• Prefer a package-named target, otherwise a sole binary/library target; diagnose ambiguous selections.
• Honor CUDA_OXIDE_PTX_DIR for both writer and reader, including workspace-relative overrides. Refresh that target's generated files there before reading fresh IR.
• Document target selection, output placement and override precedence.

Testing

• 271 cargo-oxide tests pass serially; fmt, clippy with warnings denied, and build pass.
• 14 native artifact checks cover standalone/custom targets, workspace members, overrides and existing explicit selection; four additional warm-cache member runs pass.
• The initial parallel run encountered two failures in unchanged temporary-executable tests; the complete serial rerun passes. Full just check was not run.

Checklist

• All commits signed off.
• Existing source headers preserved; no new source files.

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