SDK-562 Fix offline queue replaying expired JWT

[sumeruchat]

What

Requests persisted to the offline queue froze the JWT at enqueue time and replayed it on every retry. A task queued while the token was expired kept failing with a 401 even after a successful refresh, survived app restarts, and paused the JWT tasks queued behind it. Reported by Wolt (SDK-562).

Changes

• IterableAPICallTaskProcessor overwrites the decoded task's auth token with the current AuthManager token before building the request, matching the online path which reads the token at send time
• IterableTaskRunner and the dependency container thread the existing AuthManager instance into the processor (optional parameter, nil default, so other constructions are unchanged)
• A nil live token keeps the persisted one, and the persisted task format is unchanged, so tasks already stuck on devices heal on their next run after a refresh
• Tests reproduce the poisoned-task loop end to end: 401 with the expired token, refresh, retry goes out with the fresh token, queue drains. Re-stamp semantics across a process restart and a multi-task drain variant are also covered

Impact

• Breaking changes: None
• Dependencies: None
• Performance: One getAuthToken() read per offline task execution

Testing

How to test:

1. ./agent_build.sh
2. xcodebuild test -scheme swift-sdk -destination 'platform=iOS Simulator,name=iPhone 17 Pro' -only-testing:offline-events-tests (96 tests, 0 failures; full unit-tests also green, 644 tests)
3. Key tests: TaskRunnerTests.testJWTAuthFailureRetriesWithRefreshedToken asserts the wire sees Bearer expired-token then Bearer fresh-token; TaskProcessorTests.testUsesCurrentAuthTokenWhenProcessingPersistedTask pins re-stamp across a restart
4. Red-test proof: with the re-stamp reverted, the loop test fails with headers [expired, expired], confirming it pins the reported bug

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.32%. Comparing base (9a0eb2d) to head (480d95a).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1085      +/-   ##
==========================================
- Coverage   72.34%   72.32%   -0.02%     
==========================================
  Files         114      114              
  Lines        9585     9594       +9     
==========================================
+ Hits         6934     6939       +5     
- Misses       2651     2655       +4     

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[joaodordio]

LGTM