Bumps the actions-deps group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 6 to 7
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions-deps
...

Signed-off-by: dependabot[bot] <support@github.com>

Bumps the actions-deps group with 1 update: [actions/setup-python](https://github.com/actions/setup-python).


Updates `actions/setup-python` from 6 to 7
- [Release notes](https://github.com/actions/setup-python/releases)
- [Commits](actions/setup-python@v6...v7)

---
updated-dependencies:
- dependency-name: actions/setup-python
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions-deps
...

Signed-off-by: dependabot[bot] <support@github.com>

Prevent an expensive `_path` calculation when it is not required.

Replace `_path` (which constructs the path including AoS indices) with the static `metadata.path_string` when an attribute cannot be found.

Speeds up the following sample from 110ms to 0.5ms (200x gain):

```python
import timeit
import imas

cp = imas.IDSFactory().core_profiles()
cp.profiles_1d.resize(1000)
def totime():
    hasattr(cp.profiles_1d[999], "xyz")
print(timeit.repeat(totime, number=1000))
```

**Changed behaviour:**
Before: `AttributeError: IDS structure 'profiles_1d[999]' has no attribute 'xyz'`
After: `AttributeError: IDS structure 'profiles_1d' has no attribute 'xyz'`

Since the index of an AoS is not relevant for whether an attribute exists or not, I believe this is not a problem.