refactor(database)!: migrate to TypeScript

[russellwheatley]

Description

Breaking changes

• breaking removed the modular ServerValue named export from @react-native-firebase/database; consumers must use serverTimestamp() / increment() or the preserved namespaced firebase.database.ServerValue API instead. 352f44a
• breaking changed modular goOffline(db) and goOnline(db) so they no longer return a chainable value, which breaks consumer code that awaits them or calls .then(...) on them. 461786b
• breaking aligned the modular TypeScript surface with the firebase-js-sdk, so modular types like DatabaseReference, Query, DataSnapshot, OnDisconnect, and QueryConstraint no longer expose the older namespaced instance-style API in their public typings; TypeScript consumers may need to switch to the function-based modular helpers. db5f53b
• breaking corrected getServerTime(db) to a synchronous Date return in the modular type surface, so TypeScript consumers that previously treated it as promise-like will need to update their code. a8c2fab

Related issues

Release Summary

Checklist

• I read the Contributor Guide and followed the process outlined there for submitting PRs.
  • Yes
• My change supports the following platforms;
  • Android
  • iOS
  • Other (macOS, web)
• My change includes tests;
  • e2e tests added or updated in packages/\*\*/e2e
  • jest tests added or updated in packages/\*\*/__tests__
• I have updated TypeScript types that are affected by my change.
• This is a breaking change;
  • Yes
  • No

Test Plan

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Project	Deployment	Actions	Updated (UTC)
react-native-firebase	Error		Apr 17, 2026 5:34pm

[gemini-code-assist]

Code Review

This pull request migrates the @react-native-firebase/database package to TypeScript, introducing robust type definitions for both modular and namespaced APIs and updating the build infrastructure to use react-native-builder-bob. The changes include refactoring core classes like DatabaseDataSnapshot and DatabaseQuery to .ts and adding a snapshot of the Firebase JS SDK types for comparison. The review feedback suggests aligning the forEach callback signature with the official SDK, removing redundant type casts, and replacing unnecessary as never returns with explicit return statements for better code clarity.