Add NewSessionServiceGorm to use initialized database connections

[verdverm]

Implements #340 for SessionService database implementation

[gemini-code-assist]

Summary of Changes

Hello @verdverm, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the session service by providing a new constructor that accepts an already initialized GORM database instance. This change allows for greater flexibility and efficiency in managing database connections, as applications can now share a single database across various services, thereby optimizing resource utilization and simplifying database setup.

Highlights

• New Session Service Constructor: Introduced NewSessionServiceGorm function to create a session.Service instance using an already initialized GORM database connection.
• Database Connection Reuse: This new constructor facilitates the reuse of existing database connections across multiple ADK services and applications, improving resource management.

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[gemini-code-assist]

Code Review

This pull request introduces NewSessionServiceGorm to allow creating a session service from an existing GORM database connection. This is a useful addition for reusing database connections. My review includes a suggestion to correct the function's documentation, which appears to be inaccurate, and to add a nil check to make the function more robust and align its implementation with its error-returning signature.

[kdroste-google]

/gemini review

[gemini-code-assist]

Code Review

This pull request introduces a new constructor NewSessionServiceGorm for the database-backed session.Service. This is a useful addition as it allows reusing an existing *gorm.DB connection, which is great for integrating with applications that already manage their own database connections.

My review includes a couple of suggestions:

• A high-severity recommendation to add a nil check for the database connection to prevent potential panics.
• A medium-severity fix for a minor typo in the function's documentation.

Overall, the change is straightforward and beneficial. Addressing the feedback will make it more robust.

[verdverm]

/gemini review

[gemini-code-assist]

Code Review

This pull request introduces a new constructor NewSessionServiceGorm to allow creating a session service from an existing GORM database connection. The change is straightforward and useful for sharing database connections. My review includes a suggestion to correct a comment in the documentation and a recommendation to add unit tests for the new function to ensure its correctness and prevent future regressions.

[dpasiukevich]

@verdverm apologies for not coming to this earlier.

I'd suggest to just have one func NewSessionService(db *gorm.DB).
It's better long-term to have 1 constructor (which later can be extended with options), instead of supporting 2 almost identical ones.

I've talked with @mazas-google as he suggested to add a new func for backwards compatibility in #340 (comment). And he is also ok to keep only one.