fix: TestDiscovery items missing test_case/test_group tags causes Run in Terminal to run entire file

[tudorbertiean]

The problem

When clicking "Run in Terminal" on a specific test in the Test Explorer, the generated command runs the entire spec file instead of just that test.

resolve_test_commands (link) uses test_case and test_group tags to decide whether to include a line number in the command. But TestDiscovery never sets those tags — items only ever get ["framework:rspec"]. So every item falls through to the else branch, which adds the full file path with no line number.

Other options considered

1. Fix the else branch in resolve_test_commands — infer intent from structure: leaf nodes (no children) are test cases and should include a line number. This works but sidesteps the root cause and leaves the test_case/test_group branches as unreachable dead code.

2. Add add_tag to TestItem in ruby-lsp — the cleanest fix long-term, since TestItem is the right home for this and it would be part of the public addon API. The reason it doesn't exist is that the built-in Minitest listener lives inside ruby-lsp and can access @tags directly, so there was never pressure to expose it.

Test plan

• Added test_group/test_case tag assertions to test_discovery_spec.rb
• Added add_tag test to spec_style_patch_spec.rb
• bundle exec srb tc — no errors
• bundle exec rspec — all examples pass

[tudorbertiean]

@st0012 let me know what you think - open to any feedback on this one