Generic SideEffectStorage

[mapokko]

Summary

Allows the implementing of the SideEffectStorage trait from a generic concrete type. The changes ensure that side effect storage.

Key Changes

1. Made Side Effect Trait Generic (commit ef45f72)

• Updated SideEffectStorage trait to be generic over the side effect type T
• Added generic type parameter T to PostgresRepository and PostgresTransaction
• Modified trait bounds to properly constrain side effect types with SideEffect<SideEffectId = Uuid> +
  Pickle + Send + Sync
• Updated all repository and transaction method signatures to use the generic aggregate type

2. Completed Generic Implementation (commit c8f50bd)

• Fixed outbox implementation to work with the new generic constraints
• Updated TransactionOutboxExt to work with T::SideEffect instead of raw side effect types
• Modified RepositoryOutboxExt trait to properly handle aggregate-specific side effects
• Updated all test helpers and examples to specify the aggregate type parameter
• Added proper trait bounds ensuring aggregate types implement required traits

3. Code Formatting (commit 7009ced)

• Fixed formatting issue in transaction.rs where clause