Guard nullable GraphQL responses

[kitsuyui]

Summary

• guard nullable viewer and history GraphQL response fields before reading nested values
• return clear errors when the current user login or commit count cannot be resolved
• add regression coverage and regenerate the checked-in action bundle

Verification

• bun install --frozen-lockfile
• bun run format
• bun run lint
• bun run test
• bun run build
• git diff --check

[github-actions]

🎉 Happy commit!

• dogfooding: PR Guard nullable GraphQL responses #831 always celebrates.
• dogfooding: e9c2b008eea565ab54e48f0f75357b9414f0b0fb always celebrates.

[github-actions]

gh-counter

PR gate

	Removed	Added	+/-
TODO/FIXME	0	0	0

Repo dashboard

	main (d8fc92c)	#831 (1b896a4)	+/-
TODO/FIXME	0	0	0

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Reported by gh-counter

[github-actions]

Code Metrics Report

	main (d8fc92c)	#831 (1b896a4)	+/-
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 (d8fc92c) | #831 (1b896a4) |  +/-  |
  |---------------------|----------------|----------------|-------|
+ | Coverage            |          99.0% |          99.0% | +0.0% |
  |   Files             |              5 |              5 |     0 |
  |   Lines             |            107 |            109 |    +2 |
+ |   Covered           |            106 |            108 |    +2 |
+ | Code to Test Ratio  |          1:0.5 |          1:0.5 |  +0.0 |
  |   Code              |           1438 |           1464 |   +26 |
+ |   Test              |            777 |            799 |   +22 |
  | Test Execution Time |             1s |             1s |    0s |

Code coverage of files in pull request scope (100.0% → 100.0%)

Files	Coverage	+/-	Status
src/github.ts	100.0%	0.0%	modified

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Reported by octocov

[github-actions]

gh-build-size

Target	main	#831	+/-
Total action artifacts	23,291,895 B	23,295,317 B	+3,422 B
Runtime bundle	1,152,247 B	1,153,079 B	+832 B
Source maps	17,124,104 B	17,126,694 B	+2,590 B

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Reported by gh-build-size