feat: add stopping pipeline status

[imor]

This PR returns a stopping status when the pod is still stopping. Before this PR the pod status returned by the kubectl get pod ... command returned terminating while the api returned the running status.

Companion PR for UI: supabase/supabase#40294

[iambriccardo]

@codex review

[iambriccardo]

Great quality of life change!

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Keep it up!

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[coveralls]

Pull Request Test Coverage Report for Build 19226454794

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 32 (0.0%) changed or added relevant lines in 2 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.05%) to 82.367%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
etl-api/src/routes/pipelines.rs	0	11	0.0%
etl-api/src/k8s/http.rs	0	21	0.0%

Files with Coverage Reduction	New Missed Lines	%
etl-api/src/k8s/http.rs	1	90.32%

Totals
Change from base Build 19224853509:	-0.05%
Covered Lines:	16120
Relevant Lines:	19571

---

💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 19226454794

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 32 (0.0%) changed or added relevant lines in 2 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.05%) to 82.367%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
etl-api/src/routes/pipelines.rs	0	11	0.0%
etl-api/src/k8s/http.rs	0	21	0.0%

Files with Coverage Reduction	New Missed Lines	%
etl-api/src/k8s/http.rs	1	90.32%

Totals
Change from base Build 19224853509:	-0.05%
Covered Lines:	16120
Relevant Lines:	19571

---

💛 - Coveralls