Merge main into release

Author: google-oss-bot

.changeset/five-kids-grow.md

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+---
+'firebase': minor
+'@firebase/ai': minor
+---
+
+Add support for Grounding with Google Search.

.changeset/healthy-moons-type.md

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+---
+'firebase': major
+'@firebase/ai': major
+---
+
+Add support for `anyOf` schemas

.changeset/heavy-ties-learn.md

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+---
+'@firebase/firestore': patch
+---
+
+Revert fix for issue where Firestore would produce `undefined` for document snapshot if "clear site data" button was pressed in the web browser. This fix was introduced in v11.6.1 but inadvertantly caused issues for some customers (https://github.com/firebase/firebase-js-sdk/issues/9056).

.changeset/hip-impalas-divide.md

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+---
+'firebase': minor
+'@firebase/ai': minor
+---
+
+Add support for Thinking Budget.

.changeset/late-beers-develop.md

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+---
+'firebase': major
+---
+
+Remove `vertexai` import path

.changeset/nervous-needles-sit.md

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+---
+'@firebase/performance': patch
+---
+
+Fix bug where events are not sent if they exceed sendBeacon payload limit

.changeset/rotten-taxis-allow.md

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+---
+'@firebase/ai': patch
+---
+
+Fix typings for `functionDeclaration.parameters`.

.changeset/shy-yaks-hammer.md

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+---
+'@firebase/ai': major
+'firebase': major
+---
+
+Convert TS enums exports in Firebase AI into const variables.

.changeset/slimy-mirrors-nail.md

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+---
+'firebase': major
+'@firebase/ai': major
+---
+
+Remove GroundingAttribution

.changeset/thin-bikes-tan.md

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+---
+'@firebase/app': minor
+'firebase': minor
+---
+
+initializeServerApp now supports auto-initialization for Firebase App Hosting.