feat(shellv2): display host tags in hover tooltip

[KCarretto]

This submission adds the host tags to the hover tooltip on the ShellV2 page as requested by the user.

1. Updated the GET_SHELL GraphQL query in tavern/internal/www/src/pages/shellv2/graphql.ts to include the tags field within the host query.
2. Updated the ShellHeader component in tavern/internal/www/src/pages/shellv2/components/ShellHeader.tsx to read tags from the shellData prop.
3. Added a line to the Tooltip label for the host in ShellHeader.tsx to display the tags as a comma-separated list of their names.

The changes have been tested with the existing frontend test suite (vitest), and a Playwright verification script was used to capture a screenshot of the tooltip successfully rendering the tags in a local environment.

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PR created automatically by Jules for task 3140535286676846987 started by @KCarretto

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[github-actions]

Summary

Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Other ❓	Flaky 🍂	Duration ⏱️
2728    ±0	2728    ±0	0    ±0	0    ±0	0    ±0	0    ±0	1ms    ±0

Previous Results

Build 🏗️	Result 🧪	Tests 📝	Passed ✅	Failed ❌	Skipped ⏭️	Other ❓	Flaky 🍂	Duration ⏱️
#1470	✅	2728	2728	0	0	0	0	43.6s

Insights

Average Tests per Run	Total Flaky Tests	Total Failed	Slowest Test (p95)
2728	0	0	5.5s

Slowest Tests

Test 📝	Results 📊	Duration (avg) ⏱️	Duration (p95) ⏱️
TestDockerExecutor_Build_ContextCancellation	1	5.5s	5.5s
eldritch-libsys: std::dll_inject_impl::tests::test_dll_inject_simple	1	5.2s	5.2s
TestInteractiveShell	1	5.1s	5.1s
TestOtherStreamOutput	1	5.0s	5.0s
imix::bin/imix: install::tests::test_install_execution	3	1.6s	4.6s
imix::bin/imix: install::tests::test_install_execution	3	1.6s	4.6s
imix::bin/imix: install::tests::test_install_execution	3	1.6s	4.6s
imix::bin/imix: tests::task_tests::test_task_eprint_behavior	3	3.0s	3.0s
imix::bin/imix: tests::task_tests::test_task_eprint_behavior	3	3.0s	3.0s
imix::bin/imix: tests::task_tests::test_task_eprint_behavior	3	3.0s	3.0s

_{🎉 No failed tests in this run. | 🍂 No flaky tests in this run.}

Github Test Reporter by CTRF 💚

🔄 This comment has been updated