fix: update project ETag when the namespace slug is changed

[leafty]

See #595.

Makes the etag value change if the namespace slug changes. This fixes a bug where clients may keep an outdated cached version of a project object when the parent namespace gets updated (e.g. the group slug is modified).

/deploy

[coveralls]

Pull Request Test Coverage Report for Build 12791037118

Details

• 22 of 23 (95.65%) changed or added relevant lines in 5 files are covered.
• 5 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.003%) to 86.873%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
components/renku_data_services/project/models.py	6	7	85.71%

Files with Coverage Reduction	New Missed Lines	%
components/renku_data_services/base_api/misc.py	1	98.36%
components/renku_data_services/storage/blueprints.py	2	95.69%
components/renku_data_services/storage/models.py	2	84.11%

Totals
Change from base Build 12786097989:	0.003%
Covered Lines:	15241
Relevant Lines:	17544

---

💛 - Coveralls

[RenkuBot]

You can access the deployment of this PR at https://renku-ci-ds-596.dev.renku.ch

[Panaetius]

Looks good 👍 Just a minor suggestion, feel free to ignore

[RenkuBot]

Tearing down the temporary RenkuLab deplyoment for this PR.