build(deps-dev): bump firebase-tools from 14.27.0 to 15.9.1

[dependabot]

Bumps firebase-tools from 14.27.0 to 15.9.1.

Release notes

Sourced from firebase-tools's releases.

v15.9.1

• Added support for next.config.ts and next.config.mts in Next.js deployments (#9871)
• Enabled free trials without a billing instrument for Firebase Data Connect (#10042)

v15.9.0

• Added *_EMULATOR_VERSION env variables to allow overriding specific versions of downloadable emulators
• Updated the functions.config deprecation notice from March 2026 to March 2027 (#9941)
• Detects when App Hosting fails to deploy, returning an error. (#8866)
• Add firestore_query_collection tool back to MCP as it is not available in the OneMCP server yet.
• Add support for custom resolvers in Firebase Data Connect (#9967)
• Updated the Firebase Data Connect local toolkit to v3.2.1, which includes the following changes: (#10022)
  • Resolved metadata pathing issue for @​redact and @​check directives

v15.8.0

• Corrects issue with updateService in runv2.ts (#9918)
• Updated suite of MCP tools for Firestore to include many new tools. Firestore tools no longer support emulator mode.
• Updated the Firebase Data Connect local toolkit to v3.2.0, which includes the following changes: (#9975)
  • Support for uuidV7()
  • Support for custom PostgreSQL schema names.

v15.7.0

• Updated Python Functions template to use firebase_functions v0.5.x
• Update the Firebase Data Connect local toolkit to v3.1.4, which includes the following changes: (#9944)
  • Add support for @searchable on varchar fields.
  • Fix a runtime error when using aggregations with nested reference fields.
  • Update the Golang dependency version from v1.24.12 to v1.24.13.
• Added Developer Knowledge MCP tools which can search Google doumentation to help agents answer questions.

v15.6.0

• Added support for enabling Firebase Authentication providers via firebase deploy. You can configure providers in firebase.json like so:

{
  "auth": {
    "providers": {
      "anonymous": true,
      "emailPassword": true,
      "googleSignIn": {
        "oAuthBrandDisplayName": "My App",
        "supportEmail": "support@myapp.com"
      }
    }
  }
}

• Added initial zip deploy support in functions deploy for HTTP functions (#9707)
• Fixes an issue where Python was missing from the firebase-tools Docker image (#9855).
• Fixes billing information check to use user's project quota (#9879).
• Updated the Firebase Data Connect local toolkit to v3.1.2, which contains the following changes: (#9882)

... (truncated)

Commits

• f27ded1 15.9.1
• 02e7088 Always update to latest npm when building docker image (#10043)
• 4feab5f enable fdc instrumentless sql trial (#10042)
• 8b8a8ce add support for additional Next.js config file types (#9871)
• 80a5d3d 2.2.0 (#10036)
• 0ca486c [firebase-release] Removed change log and reset repo after 15.9.0 release
• e4ef812 15.9.0
• 0ce0329 Flip resolvers flag. (#9967)
• 87ec0f7 update fdc emulator to 3.2.1 (#10022)
• 75e5fd7 Improve fdc iftrial error messages edge cases (#10014)
• Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

[dependabot]

Superseded by #1217.