Relative indexes in PEP 723 scripts are resolved against the current working directory

## Summary Relative local indexes declared in a PEP 723 script are resolved against the directory where `uv run` is invoked, rather than the directory containing the script. So the same script can work when ran from its own directory but fail when ran by path from somewhere else ## Reproduction ```console $ tmpdir="$(mktemp -d)" $ mkdir -p "$tmpdir/scripts/links" "$tmpdir/elsewhere" $ python3 - "$tmpdir/scripts/links/ok-1.0.0-py3-none-any.whl" <<'PY' import sys from zipfile import ZipFile with ZipFile(sys.argv[1], "w") as wheel: wheel.writestr("ok.py", "") wheel.writestr( "ok-1.0.0.dist-info/METADATA", "Metadata-Version: 2.3\nName: ok\nVersion: 1.0.0\n", ) wheel.writestr( "ok-1.0.0.dist-info/WHEEL", "Wheel-Version: 1.0\nRoot-Is-Purelib: true\nTag: py3-none-any\n", ) wheel.writestr("ok-1.0.0.dist-info/RECORD", "") PY $ cat >"$tmpdir/scripts/main.py" <<'PY' # /// script # requires-python = ">=3.11" # dependencies = ["ok"] # # [[tool.uv.index]] # name = "local" # url = "./links" # format = "flat" # # [tool.uv.sources] # ok = { index = "local" } # /// import ok print("ok imported") PY $ cd "$tmpdir/scripts" $ uv run --offline main.py ok imported $ cd "$tmpdir/elsewhere" $ uv run --offline "$tmpdir/scripts/main.py" error: Failed to read `--find-links` directory: .../elsewhere/links Caused by: No such file or directory (os error 2) ``` ## Expected behavior `./links` is resolved relative to the directory containing `main.py`, so both invocations print: ```shell ok imported ``` ## Actual behavior The second invocation resolves `./links` relative to the current working directory as `elsewhere/links` and fails ### Platform Darwin 25.5.0 arm64 ### Version uv 0.12.3 (507230998 2026-08-07 aarch64-apple-darwin) ### Python version 3.14.0