fix(pull-requests): match native Gitea warning status semantics

[kalvenschraut]

A Gitea warning commit status contributes to a failing native check summary, but the PR detail previously showed that check as neutral. Map warning to failure so the list and detail agree with Gitea’s native status combiner.

The 59 focused Gitea API tests, final server typecheck, and targeted lint pass, including a warning-status regression. This adds one case to the integrated stack’s 228 previously passing focused tests.

Model: GPT-6 Astra; native-source audit GPT-5.6 Luna. Harness: Codex.

[kalvenschraut]

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📥 Commits

Reviewing files that changed from the base of the PR and between 256fd6f and 93580c0.

📒 Files selected for processing (2)

• apps/server/src/pullRequest/GiteaPullRequestApi.test.ts
• apps/server/src/pullRequest/GiteaPullRequestApi.ts

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[kalvenschraut]

@coderabbitai review

Please review this PR at its exact current head in stack pingdotgg#6. Verify correctness, regressions, security boundaries, and focused coverage against its current base, and report any actionable findings with file references.

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@kalvenschraut I will review pull request #23 at its current head against its current base. I will report actionable findings with file references.

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