Update to Firebase 12.9.0

[github-actions]

The Firebase Apple SDK (12.9.0) is now available. For more details, see
the Firebase Apple SDK release notes.

To install this SDK, see Add Firebase to your project.

What's Changed

• fix: collisions in artifact names from re-usable catalyst job by @ncooke3 in fix: collisions in artifact names from re-usable catalyst job firebase/firebase-ios-sdk#15709
• fix: exempt changelogs from CODEOWNERS by @ncooke3 in fix: exempt changelogs from CODEOWNERS firebase/firebase-ios-sdk#15712
• [Release] Update Carthage artifacts for 12.8.0 by @andrewheard in [Release] Update Carthage artifacts for 12.8.0 firebase/firebase-ios-sdk#15713
• [Release] Update versions for 12.9.0 by @andrewheard in [Release] Update versions for 12.9.0 firebase/firebase-ios-sdk#15714
• [Auth] Should not force App Check token refreshes by @paulb777 in [Auth] Should not force App Check token refreshes firebase/firebase-ios-sdk#15716
• Fix SymbolCollision workflow flakes by @google-labs-jules[bot] in Fix SymbolCollision workflow flakes firebase/firebase-ios-sdk#15717
• [FirebaseAI] Implicit caching support by @paulb777 in [FirebaseAI] Implicit caching support firebase/firebase-ios-sdk#14944
• [AI] URL Context is now GA in Gemini models by @paulb777 in [AI] URL Context is now GA in Gemini models firebase/firebase-ios-sdk#15719
• [AI] Update integration test for changed Gemini 3 thinking by @paulb777 in [AI] Update integration test for changed Gemini 3 thinking firebase/firebase-ios-sdk#15708
• [AI] Restore URL Context integration test by @paulb777 in [AI] Restore URL Context integration test firebase/firebase-ios-sdk#15707
• [AI] minimal thinking level no longer thinks by @paulb777 in [AI] minimal thinking level no longer thinks firebase/firebase-ios-sdk#15721
• Add unit test for FirebaseOptions copying by @google-labs-jules[bot] in Add unit test for FirebaseOptions copying firebase/firebase-ios-sdk#15722
• fix: install missing sims in sdk.storage.yml by @ncooke3 in fix: install missing sims in sdk.storage.yml firebase/firebase-ios-sdk#15724
• fix: install missing sims in sdk.auth.yml by @ncooke3 in fix: install missing sims in sdk.auth.yml firebase/firebase-ios-sdk#15731
• [AI] More robust thoughtTokenCount gemini 3 test by @paulb777 in [AI] More robust thoughtTokenCount gemini 3 test firebase/firebase-ios-sdk#15730
• [AI] Add an implicit caching unit test by @paulb777 in [AI] Add an implicit caching unit test firebase/firebase-ios-sdk#15727
• [Crashlytics] Conforming to Mach IPC security restrictions by @themiswang in [Crashlytics] Conforming to Mach IPC security restrictions firebase/firebase-ios-sdk#15612
• fix: flaky FIRMessagingPendingTopicsListTest.m by @ncooke3 in fix: flaky FIRMessagingPendingTopicsListTest.m firebase/firebase-ios-sdk#15726
• [Crashlytics] Mach IPC identity protected address backwards compatibility by @themiswang in [Crashlytics] Mach IPC identity protected address backwards compatibility firebase/firebase-ios-sdk#15725
• [Crashlytics] Add attribute for Info.plist to manually force back to mach exception default behavior by @themiswang in [Crashlytics] Add attribute for Info.plist to manually force back to mach exception default behavior firebase/firebase-ios-sdk#15735
• fix: install missing sims in sdk.performance.yml by @ncooke3 in fix: install missing sims in sdk.performance.yml firebase/firebase-ios-sdk#15738
• fix: extend lint timeout in sdk.crashlytics.yml by @ncooke3 in fix: extend lint timeout in sdk.crashlytics.yml firebase/firebase-ios-sdk#15739
• fix: install missing sims in sdk.inappmessaging.yml by @ncooke3 in fix: install missing sims in sdk.inappmessaging.yml firebase/firebase-ios-sdk#15741
• chore: remove unused scripts by @ncooke3 in chore: remove unused scripts firebase/firebase-ios-sdk#15744
• fix: fail prerelease workflow if prerelease tagging fails by @ncooke3 in fix: fail prerelease workflow if prerelease tagging fails firebase/firebase-ios-sdk#15747
• [Firestore] Update proto copyright dates by @dlarocque in [Firestore] Update proto copyright dates firebase/firebase-ios-sdk#15751
• fix: Xcode/OS matrices in reusable SPM and CP workflows by @ncooke3 in fix: Xcode/OS matrices in reusable SPM and CP workflows firebase/firebase-ios-sdk#15732
• fix: Move reusable SPM and CocoaPods workflows to use Xcode 26.2 by @ncooke3 in fix: Move reusable SPM and CocoaPods workflows to use Xcode 26.2 firebase/firebase-ios-sdk#15756
• Change the behaviour of not-in and != when convert standard query to pipeline by @cherylEnkidu in Change the behaviour of not-in and != when convert standard query to pipeline firebase/firebase-ios-sdk#15667
• docs: changelogs for m176 by @ncooke3 in docs: changelogs for m176 firebase/firebase-ios-sdk#15771
• docs: add naming guidelines for GHA by @ncooke3 in docs: add naming guidelines for GHA firebase/firebase-ios-sdk#15772
• chore: update firestore binary for m176 (#15779) by @ncooke3 in chore: update firestore binary for m176 (#15779) firebase/firebase-ios-sdk#15781

Full Changelog: firebase/firebase-ios-sdk@12.8.0...12.9.0