…gets

- CocoaPods: Add selective retry for `pod trunk push` with exponential
  backoff. Retries on transient errors (CDN timeouts, 5xx, network errors)
  but fails fast on permanent errors (spec validation, auth).

- GitHub: Detect existing releases on re-run. If a previous run published
  the release but crashed before persisting state, skip creation instead
  of failing with 422.

- GitHub: Re-fetch release state before rollback deletion. Prevents
  deleting a live release when `publishRelease()` half-succeeded (server
  processed it but response timed out). Also handles immutable releases
  gracefully.

- GitHub: Make floating tag failures non-fatal after successful publish.
  Prevents marking the target as failed when the release is already live,
  which would cause duplicate-release errors on re-run.

Aligns with the Crates target naming convention (MAX_ATTEMPTS) and
clarifies that the value represents total attempts including the
initial one, not just retries after the first failure.

Replace broad patterns like '502', '503', and 'http error' with more
specific ones like '502 bad gateway', '503 service unavailable', and
'server error (5' to avoid misclassifying permanent errors that happen
to contain those substrings.

When a pod trunk push attempt succeeds on the server but the response
times out, the retry fails with "has already been pushed". Treat this
as success (same pattern as the Crates target with "is already uploaded")
instead of failing the publish.

- CRITICAL: getReleaseByTag returns 404 for draft releases. Replaced
  upfront draft detection with 422-recovery pattern: catch the 422
  from createDraftRelease, find the conflicting draft via listReleases,
  delete it, and retry. Published release detection via getReleaseByTag
  still works correctly (main recovery scenario).

- MEDIUM: Removed overly broad 'timeout' and 'cdn:' transient error
  patterns. Added 'trunk.cocoapods.org' alongside 'cdn.cocoapods.org'
  for specificity.

- MEDIUM: Added TOCTOU race condition comment in rollback section.

- MEDIUM: Improved 'already published' comment to document that it
  also handles the re-run-of-entire-pipeline case.

- Fixed test mock isolation: use resetAllMocks instead of clearAllMocks,
  use mockRejectedValueOnce consistently to prevent state leaks between
  tests.

Addresses BugBot feedback about pagination. A leftover draft from a
crashed run will be among the most recent releases, so the first page
is sufficient. Increased from 30 to 100 for extra safety margin.

If deleteRelease fails for all leftover drafts (e.g., immutable
releases), re-throw the original 422 instead of retrying
createDraftRelease which would just produce another 422.