Harden gitea_auth.api_request: add a per-request timeout (env
GITEA_HTTP_TIMEOUT), convert timeouts and DNS/network failures
(URLError/TimeoutError) into clear RuntimeErrors, give 502/503/504 an
explicit 'upstream unavailable' message, convert malformed success JSON
into a clean error, and redact credential-like substrings from all error
text. Preserves the success path and existing 429 retry/backoff.
Add shared gitea_auth.api_get_all: page-based pagination that tolerates
missing/malformed metadata (relies on page length, not Link/X-Total-Count
headers), honors an optional overall limit, and caps pages. Wire it into
the read-only list tools gitea_list_issues, gitea_list_prs, and
gitea_list_labels (return shape unchanged).
Add tests/test_api_reliability.py (18 cases) and update the three list-tool
tests to the new call path. No auth/profile/merge/review/tracker behavior
changed. No modular #65 refactor.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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