chore(ci): try using the spec test reporter instead of tab

[CommanderStorm]

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📝 Summary of changes done and why they are done

this changes from

> cross-env TEST_BACKEND=1 node --test test/backend-test

TAP version 13
# Subtest: Check Translations
    # Subtest: should not have missing translation keys
    ok 1 - should not have missing translation keys
      ---
      duration_ms: 26.698205
      ...
    1..1
ok 1 - Check Translations
  ---
  duration_ms: 28.26023
  type: 'suite'
  ...
# Subtest: Expression Evaluator
    # Subtest: evaluateExpression() returns true when condition matches and false otherwise
    ok 1 - evaluateExpression() returns true when condition matches and false otherwise
      ---
      duration_ms: 1.400332
      ...
    # Subtest: evaluateExpressionGroup() with AND logic requires all conditions to be true
    ok 2 - evaluateExpressionGroup() with AND logic requires all conditions to be true
      ---
      duration_ms: 0.4022
      ...
    # Subtest: evaluateExpressionGroup() with OR logic requires at least one condition to be true
    ok 3 - evaluateExpressionGroup() with OR logic requires at least one condition to be true
      ---
      duration_ms: 0.294209
      ...
    # Subtest: evaluateExpressionGroup() evaluates nested groups correctly
    ok 4 - evaluateExpressionGroup() evaluates nested groups correctly
      ---
      duration_ms: 0.400818
      ...
    1..4
ok 2 - Expression Evaluator
  ---

to something more resonable like

▶ Check Translations
  ✔ should not have missing translation keys (152.595483ms)
✔ Check Translations (155.568093ms)
▶ Expression Evaluator
  ✔ evaluateExpression() returns true when condition matches and false otherwise (2.359275ms)
  ✔ evaluateExpressionGroup() with AND logic requires all conditions to be true (0.606662ms)
  ✔ evaluateExpressionGroup() with OR logic requires at least one condition to be true (0.80885ms)
  ✔ evaluateExpressionGroup() evaluates nested groups correctly (0.498249ms)
✔ Expression Evaluator (7.405674ms)
✔ Test ConditionExpressionGroup.fromMonitor (2.637844ms)

[Copilot]

Pull request overview

This PR improves the readability of backend test output by changing the test reporter from the default TAP (Test Anything Protocol) format to the more human-friendly spec format. The change affects how test results are displayed during local development and CI runs, making them easier to read with visual indicators like checkmarks and a cleaner hierarchical structure.

• Adds --test-reporter=spec flag to both Node.js 20 and 22 test commands
• Transforms verbose TAP output into concise, visually structured test results