fix(deps): update dependency firebase-functions to v6

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
firebase-functions	^4.9.0 -> ^6.6.0

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Release Notes

firebase/firebase-functions (firebase-functions)

v6.6.0

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• Add defineJsonSecret API for storing structured JSON objects in Cloud Secret Manager. (#​1745)
• Enhance validation against incomplete/invalid app_remove events to avoid runtime crashes. (#​1738)

v6.5.0

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• Add LLM guidance (#​1736)
• Fix issue calling DataSnapshot methods with null data (#​1661)
• Adds auth.rawToken to context to allow access to the underlying token. (#​1678)
• Fix logger runtime exceptions #(1704)

v6.4.0

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• Add @​deprecated annotation to callable functions's auth policy (#​1675)
• Allows CORS to be a parameter. (#​1688)
• Make traceContext accessible (#​1696)

v6.3.2

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v6.3.1

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• Fix bug where sse response hangs if handler threw an error. (#​1668)

v6.3.0

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• Add onCallGenkit (#​1655)

v6.2.0

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• Add an authPolicy callback to CallableOptions for reusable auth middleware as well as helper auth policies (#​1650)
• Handle ESM functions codebases containing top-level awaits, which would break in node 22.12+ (#​1651)
• Multiple breaking changes to the not-yet-announced streaming feature for Callable Functions (#​1652)

v6.1.2

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• Update callable function to better support long running requests (#​1635)

v6.1.1

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• Fix bug where wrapInit wasn't called on v2 callable functions. (#​1634)
• Add support for callable function to return streaming response (#​1629)
• Add support for firebase-admin@​13 (#​1641)

v6.1.0

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• Bump express version to 4.19.2 (#​1624)
• Add support for beforeSmsSent auth blocking triggers. (#​1589)

v6.0.1

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• Fix bug where v1 functions can't be emulated (#​1615)

v6.0.0

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• Breaking: Change default entrypoint of the firebase-functions package to v2 instead of v1 (#​1594)
• Add @​deprecated annotation on functions.config() API (#​1604)

v5.1.1

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• Fix retry in event triggered functions. (#​1463)
• Expose retry configuration in v2 RTDB trigger (#​1588)
• Fix CORS options for v2 callable functions (#​1564)
• Remove invalid enforceAppCheck option for v2 onRequest trigger (#​1477)

v5.1.0

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• Future Extensions support (#​1590)

v5.0.1

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• Fix App fetching for named firestore instances (#​1562).

v5.0.0

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• Add option to get named firestore instance for v2 firestore functions (#​1550).
• Remove firebase-admin v10 dependency for Firestore triggers multi-DB support (#​1555).

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