Make test workflow failures blocking

[kitsuyui]

Summary

• Remove continue-on-error from the test workflow so lint, test, build, and build-size failures block the check.
• Keep the existing workflow triggers, permissions, and steps unchanged.

Validation

• git diff --check
• ruby -e 'require "yaml"; YAML.load_file(".github/workflows/test.yml"); puts "yaml ok"'\n- actionlint .github/workflows/test.yml\n- bun run lint\n- bun run test\n- bun run build && git diff --stat --exit-code -- dist\n\nNote: the build currently emits upstream dependency type export warnings from ajv / fast-uri, but it exits successfully and leaves dist unchanged.

[github-actions]

🎉 Happy commit!

• dogfooding: PR Make test workflow failures blocking #822 always celebrates.
• dogfooding: 860ca2af381a49684a8dfdf4684b4e80add4157d always celebrates.

[github-actions]

Code Metrics Report

	main (4cc8b0c)	#822 (d7f3c76)	+/-
Coverage	99.0%	99.0%	0.0%
Code to Test Ratio	1:0.5	1:0.5	0.0
Test Execution Time	1s	1s	0s

Details

  |                     | main (4cc8b0c) | #822 (d7f3c76) | +/-  |
  |---------------------|----------------|----------------|------|
  | Coverage            |          99.0% |          99.0% | 0.0% |
  |   Files             |              5 |              5 |    0 |
  |   Lines             |            107 |            107 |    0 |
  |   Covered           |            106 |            106 |    0 |
  | Code to Test Ratio  |          1:0.5 |          1:0.5 |  0.0 |
  |   Code              |           1386 |           1386 |    0 |
  |   Test              |            758 |            758 |    0 |
  | Test Execution Time |             1s |             1s |   0s |

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Reported by octocov