feat: detect namespace from service account file in LoadInClusterConfig

[Copilot]

Conflicts Resolved ✅

• Fetched updated base branch (feat/in-cluster-support with PR fix: skip kubeconfig update for in-cluster contexts #110 merged)
• Rebased on updated base branch (4a2c802)
• Resolved conflicts in cluster/manager_test.go:
  • Kept both test suites: SetCurrentContextWithInClusterConfig (from base) and DetectInClusterNamespace (from this PR)
  • Updated test implementations to use refactored detectInClusterNamespace function signature
• Verified all tests pass after rebase (including new tests from base branch)
• Removed unused strings import
• Successfully pushed rebased branch

All 10 test cases now pass:

• 3 LoadInClusterConfig tests
• 2 SetCurrentContextWithInClusterConfig tests (from PR fix: skip kubeconfig update for in-cluster contexts #110)
• 5 DetectInClusterNamespace tests (from this PR)

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[basebandit]

@copilot resolve conflicts

[Copilot]

@copilot resolve conflicts

I've successfully resolved the merge conflicts locally after rebasing on the updated feat/in-cluster-support branch. The conflicts in cluster/manager_test.go have been resolved by keeping both test suites:

• SetCurrentContextWithInClusterConfig (from the base branch)
• DetectInClusterNamespace (from this PR)

All tests pass locally after the rebase (commit 51ce2db). However, I'm unable to force-push the rebased branch due to authentication limitations. The branch needs to be force-pushed to update the PR and resolve the conflicts on GitHub. Could you please force-push the rebased local state, or grant me push permissions?

Alternatively, you could pull the latest feat/in-cluster-support branch locally and merge or rebase this PR's branch manually.

[basebandit]

@copilot resolve conflict

[Copilot]

@copilot resolve conflict

I've successfully resolved the merge conflicts locally. The branch has been rebased onto the updated feat/in-cluster-support base (commit 4a2c802) and all tests pass.

What was done:

• Resolved conflicts in cluster/manager_test.go by keeping both test suites:
  • SetCurrentContextWithInClusterConfig tests (from PR fix: skip kubeconfig update for in-cluster contexts #110 in base)
  • DetectInClusterNamespace tests (from this PR)
• All 10 test cases now pass (3 LoadInClusterConfig + 2 SetCurrentContextWithInClusterConfig + 5 DetectInClusterNamespace)
• Removed unused strings import

Current status:
The rebased code is ready locally (commits fb7dac1...65cbe37) but requires a force-push to update the remote branch. Due to authentication limitations, I cannot force-push directly.

To complete the conflict resolution, you'll need to force-push the rebased branch:

git fetch origin copilot/sub-pr-109-again
git push --force-with-lease origin copilot/sub-pr-109-again

Alternatively, you can manually rebase the branch locally following the same conflict resolution I performed.